fix(search-enabled) keyboard navigation does not work when search-enabled is false

Closes angular-ui#375 PRs angular-ui#1114 and angular-ui#1109

fix(indentation)  use 2 spaces, add white-space

Author: fcaballero

src/bootstrap/select.tpl.html

@@ -6,7 +6,7 @@
          aria-owns="ui-select-choices-{{ $select.generatedId }}"
          aria-activedescendant="ui-select-choices-row-{{ $select.generatedId }}-{{ $select.activeIndex }}"
          class="form-control ui-select-search"
-         ng-class="{'ui-select-offscreen':!$select.searchEnabled}"
+         ng-class="{'ui-select-offscreen': !$select.searchEnabled}"
          placeholder="{{$select.placeholder}}"
          ng-model="$select.search"
          ng-show="$select.open">

src/select2/select.tpl.html

@@ -7,7 +7,7 @@
   <div class="ui-select-dropdown select2-drop select2-with-searchbox select2-drop-active"
        ng-class="{'select2-display-none': !$select.open}">
     <div class="select2-search" ng-class="{'ui-select-offscreen': !$select.searchEnabled}">
-      <input type="text" autocomplete="off" autocorrect="false" autocapitalize="off" spellcheck="false"
+      <input type="search" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"
        role="combobox"
        aria-expanded="true"
        aria-owns="ui-select-choices-{{ $select.generatedId }}"

src/selectize/select.tpl.html

@@ -5,7 +5,7 @@
     <div class="ui-select-match"></div>
     <input type="search" autocomplete="off" tabindex="-1"
            class="ui-select-search ui-select-toggle"
-           ng-class="{'ui-select-search-hidden':!$select.searchEnabled}"
+           ng-class="{'ui-select-search-hidden': !$select.searchEnabled}"
            ng-click="$select.toggle($event)"
            placeholder="{{$select.placeholder}}"
            ng-model="$select.search"