Misc fixes for event log.

  - Fixed single event log overflow.
  - Fixed incorrect class on log search filter button.
  - Fixed incorrect nested div.
  - Removed duplicate accordion trigger class in event log.
  - Fixed hover for checkboxes to be more prominent.
  - Fixed margin issue with action header for event log.

Change-Id: I156f516316675afde98c233057a8247bc17a1459
diff --git a/app/common/directives/log-search-control.html b/app/common/directives/log-search-control.html
index 0c0c7de..bfd461b 100644
--- a/app/common/directives/log-search-control.html
+++ b/app/common/directives/log-search-control.html
@@ -1,5 +1,5 @@
 <div class="content__search">
     <label for="content__search-input">Event Log Search</label>
     <input id="content__search-input" type="text" placeholder="Filter issues" ng-model="customSearch" ng-keydown="doSearchOnEnter($event)"/>
-    <input id="content__search-submit" type="submit" class="btn btn-secondary" value="Filter" ng-click="doSearchOnClick()"/>
+    <input id="content__search-submit" type="submit" class="btn btn-primary" value="Filter" ng-click="doSearchOnClick()"/>
 </div>
\ No newline at end of file
diff --git a/app/common/styles/components/form-elements.scss b/app/common/styles/components/form-elements.scss
index 3b88fd5..d674bbc 100644
--- a/app/common/styles/components/form-elements.scss
+++ b/app/common/styles/components/form-elements.scss
@@ -111,13 +111,14 @@
   width: 20px;
   height: 20px;
   background: $white;
-  border: 1px solid $medgrey;
+  border: 1px solid $lightbg__grey;
 }
 
 /* Hover and focus states */
 .control-check:hover input ~ .control__indicator,
 .control-check input:focus ~ .control__indicator {
   border: 1px solid $primebtn__bg;
+  background-color: $primebtn__bg;
 }
 
 /* Checked state */