Deal with lost focus when selection cleared

This was missed out of the work on improving focus
on the templates page.

When you clear the current selection, the 'clear'
link disappears so focus needs to be sent
somewhere.

app/assets/javascripts/templateFolderForm.js

@@ -35,7 +35,7 @@
       // first off show the new template / new folder buttons
       this.currentState = this.$form.data('prev-state') || 'unknown';
       if (this.currentState === 'unknown') {
-        this.selectActionButtons(false);
+        this.selectActionButtons();
       } else {
         this.render();
       }
@@ -90,13 +90,14 @@
     };
 
     this.addClearButton = function(state) {
-
+      let selector = 'button[value=add-new-template]';
       let $clear = this.makeButton('Clear', () => {
+
         // uncheck all templates and folders
         this.$form.find('input:checkbox').prop('checked', false);
 
         // go back to action buttons
-        this.selectActionButtons();
+        this.selectActionButtons(selector);
       });
 
       state.$el.find('.template-list-selected-counter').append($clear);