fix(autocomplete): change to type="search"

- Change inputs to `type="search"`
- Change to `autocomplete="off"` as per HTML spec

Closes angular-ui#991

Author: ruipenso

src/bootstrap/select-multiple.tpl.html

@@ -1,11 +1,11 @@
 <div class="ui-select-container ui-select-multiple ui-select-bootstrap dropdown form-control" ng-class="{open: $select.open}">
   <div>
     <div class="ui-select-match"></div>
-    <input type="text"
+    <input type="search"
            autocomplete="off" 
            autocorrect="off" 
            autocapitalize="off" 
-           spellcheck="false" 
+           spellcheck="false"
            class="ui-select-search input-xs"
            placeholder="{{$selectMultiple.getPlaceholder()}}"
            ng-disabled="$select.disabled"

src/bootstrap/select.tpl.html

@@ -1,6 +1,6 @@
 <div class="ui-select-container ui-select-bootstrap dropdown" ng-class="{open: $select.open}">
   <div class="ui-select-match"></div>
-  <input type="text" autocomplete="off" tabindex="-1"
+  <input type="search" autocomplete="off" tabindex="-1"
          aria-expanded="true"
          aria-label="{{ $select.baseTitle }}"
          aria-owns="ui-select-choices-{{ $select.generatedId }}"

src/select2/select-multiple.tpl.html

@@ -5,7 +5,7 @@
     <span class="ui-select-match"></span>
     <li class="select2-search-field">
       <input
-        type="text"
+        type="search"
         autocomplete="off"
         autocorrect="off"
         autocapitalize="off"

src/selectize/select.tpl.html

@@ -3,7 +3,7 @@
        ng-class="{'focus': $select.open, 'disabled': $select.disabled, 'selectize-focus' : $select.focus}"
        ng-click="$select.open && !$select.searchEnabled ? $select.toggle($event) : $select.activate()">
     <div class="ui-select-match"></div>
-    <input type="text" autocomplete="off" tabindex="-1"
+    <input type="search" autocomplete="off" tabindex="-1"
            class="ui-select-search ui-select-toggle"
            ng-class="{'ui-select-search-hidden':!$select.searchEnabled}"
            ng-click="$select.toggle($event)"