accessibility fixes and minor css changes.

- added aria-hidden = "true" to prevent icons to be read by screen readers
- moved code on pages into "page-header" for better consistency

Change-Id: I3f497b2707991f7f628892a05734eea183a0d01d
Signed-off-by: Michael Davis <michael.s.davis@ibm.com>
diff --git a/app/server-control/controllers/power-operations-controller.html b/app/server-control/controllers/power-operations-controller.html
index bb2655e..308546b 100644
--- a/app/server-control/controllers/power-operations-controller.html
+++ b/app/server-control/controllers/power-operations-controller.html
@@ -2,10 +2,7 @@
 
     <div class="row column">
         <h1>Server power operations</h1>
-    </div>
-
-    <div class="row column">
-        <div class="power__current-status ">
+        <div class="power__current-status page-header">
             <h2 class="inline h4">Current status</h2>
             <div class="power__status-log inline float-right">Last power operation at <span class="courier-bold">{{dataService.last_updated |date:'h:mm:ss on MMM dd yyyy'}}</span></div>
         </div>
@@ -23,28 +20,28 @@
 
         <!-- Power on displays only when server is shutdown -->
         <div class="row column power-option" ng-hide="dataService.server_state == 'Running' || dataService.server_state == 'Quiesced'" ng-class="{disabled: dataService.server_unreachable || (confirm && !power_confirm) || dataService.loading, transitionAll: confirm && power_confirm}">
-            <button id="power__power-on" class="btn-secondary inline" ng-click="togglePower()" role="button" ng-disabled="dataService.server_unreachable"><img src="assets/images/icon-power.svg" alt="power on">Power on</button>
+            <button id="power__power-on" class="btn-secondary inline" ng-click="togglePower()" role="button" ng-disabled="dataService.server_unreachable"><img src="assets/images/icon-power.svg" alt="power on" aria-hidden="true">Power on</button>
             <p class="inline">Attempts to power on the server</p>
         </div>
 
         <!-- Power reboot/shutdown options : when server is off all of these are hidden. When one option is selected, the others are disabled. -->
         <div class="row column power-option" ng-hide="dataService.server_state == 'Off'" ng-class="{disabled: dataService.server_unreachable || (confirm && !warmboot_confirm) || dataService.loading, transitionAll: confirm && warmboot_confirm}">
-            <button id="power__warm-boot" class="btn-secondary inline" ng-click="warmRebootConfirm()" role="button" ng-disabled="dataService.server_unreachable"><i>&#x21BB</i> Warm reboot</button>
+            <button id="power__warm-boot" class="btn-secondary inline" ng-click="warmRebootConfirm()" role="button" ng-disabled="dataService.server_unreachable"><i aria-hidden="true">&#x21BB</i> Warm reboot</button>
             <p class="inline">Attempts to perform an orderly shutdown before restarting the server</p>
             <confirm title="warm reboot" confirm="warmboot_confirm" ng-show="warmboot_confirm" callback="warmReboot"></confirm>
         </div>
         <div class="row column power-option" ng-hide="dataService.server_state == 'Off'" ng-class="{disabled: dataService.server_unreachable || (confirm && !coldboot_confirm) || dataService.loading, transitionAll: confirm && coldboot_confirm}">
-            <button id="power__cold-boot" class="btn-secondary inline" ng-click="coldRebootConfirm()" role="button" ng-disabled="dataService.server_unreachable"><i>&#x21BB</i> Cold reboot</button>
+            <button id="power__cold-boot" class="btn-secondary inline" ng-click="coldRebootConfirm()" role="button" ng-disabled="dataService.server_unreachable"><i aria-hidden="true">&#x21BB</i> Cold reboot</button>
             <p class="inline">Shuts down the server immediately, then restarts it</p>
             <confirm title="cold reboot" confirm="coldboot_confirm" ng-show="coldboot_confirm" cancel="coldbootCancel" callback="coldReboot"></confirm>
         </div>
         <div class="row column power-option" ng-hide="dataService.server_state == 'Off'" ng-class="{disabled: dataService.server_unreachable || (confirm && !orderly_confirm) || dataService.loading, transitionAll: confirm && orderly_confirm}">
-            <button id="power__soft-shutdown" class="btn-secondary inline" ng-click="orderlyShutdownConfirm()" role="button" ng-disabled="dataService.server_unreachable"><img src="assets/images/icon-power.svg" />Orderly shutdown</button>
+            <button id="power__soft-shutdown" class="btn-secondary inline" ng-click="orderlyShutdownConfirm()" role="button" ng-disabled="dataService.server_unreachable"><img aria-hidden="true" src="assets/images/icon-power.svg" />Orderly shutdown</button>
             <p class="inline">Attempts to stop all software on the server before removing power</p>
             <confirm title="orderly shutdown" confirm="orderly_confirm" ng-show="orderly_confirm" cancel="orderlyShutdownCancel" callback="orderlyShutdown"></confirm>
         </div>
         <div class="row column power-option" ng-hide="dataService.server_state == 'Off'" ng-class="{disabled: dataService.server_unreachable || (confirm && !immediately_confirm) || dataService.loading, transitionAll: confirm && immediately_confirm}">
-            <button id="power__hard-shutdown" class="btn-secondary inline" ng-click="immediateShutdownConfirm()" role="button" ng-disabled="dataService.server_unreachable"><img src="assets/images/icon-power.svg" />Immediate shutdown</button>
+            <button id="power__hard-shutdown" class="btn-secondary inline" ng-click="immediateShutdownConfirm()" role="button" ng-disabled="dataService.server_unreachable"><img aria-hidden="true" src="assets/images/icon-power.svg" />Immediate shutdown</button>
             <p class="inline">Removes power from the server without waiting for software to stop</p>
             <confirm title="immediate shutdown" confirm="immediately_confirm" ng-show="immediately_confirm" cancel="immediatelyShutdownCancel" callback="immediateShutdown"></confirm>
         </div>