[Indicators] Add tooltip

Add tooltips to indicators, using a description field
from the provided indicator. WTD-608.

platform/commonUI/general/res/templates/indicator.html

@@ -1,4 +1,5 @@
 <div class='status block'
+     title="{{ngModel.getDescription()}}"
      ng-click='ngModel.configure()'
      ng-class='ngModel.getClass()'>
     <span class="ui-symbol status-indicator"

platform/persistence/src/CouchIndicator.js

@@ -85,6 +85,14 @@ define(
                  */
                 getText: function () {
                     return state.text;
+                },
+                /**
+                 * Get a longer-form description of the current connection
+                 * space, suitable for display in a tooltip
+                 * @returns {string} longer summary of connection status
+                 */
+                getDescription: function () {
+                    return state.description;
                 }
             };