fix date/time representation in national locales

Added "localeDate" filter to present date and time in preferred format:
 - the date will be displayed as: 'Dec 3, 2018'
 - the time will be displayed in locale preferred format.
 - the timezone will be displayed as abbrev or GMT+/-offset.

At the 'Date and Time setting' the time zone name will displayed in long
format if it is possible.

All text parts of date/time representation will be in English.

Resolves: openbmc/phosphor-webui#42

Change-Id: I2fdbb47c62dfc5000039b0c00a20f64a9a389fc6
Signed-off-by: Alexander Filippov <a.filippov@yadro.com>
diff --git a/app/server-health/controllers/log-controller.html b/app/server-health/controllers/log-controller.html
index 7aadc11..f3f9e89 100644
--- a/app/server-health/controllers/log-controller.html
+++ b/app/server-health/controllers/log-controller.html
@@ -8,11 +8,11 @@
       <h2 class="inline h4">All events from the BMC</h2>
       <div class="event-log__timezone inline float-right">
         <button class="dropdown__button" ng-click="timezone = timezone == true ? false : true;" toggle-flag="timezone">
-          <span>{{tmz === 'UTC'? 'UTC Timezone' : 'User Timezone'}}</span>
+          <span>{{tmz === 'UTC' ? 'UTC Timezone' : 'User Timezone'}}</span>
         </button>
         <ul class="dropdown__list inline" ng-show="timezone">
           <li>
-            <button ng-click="selectUserTimezone();">User Timezone</button>
+            <button ng-click="tmz = ''">User Timezone</button>
           </li>
           <li>
             <button ng-click="tmz = 'UTC'">UTC Timezone</button>