Added button to go back to query list after visiting a query

assets/javascripts/discourse/controllers/admin-plugins-explorer.js.es6

@@ -92,6 +92,12 @@ export default Ember.Controller.extend({
 
     scrollTop() {
       window.scrollTo(0,0);
+      this.set('editing', false);
+      this.set('everEditing', false);
+    },
+
+    goBack() {
+      history.back();
     },
 
     resetParams() {

assets/javascripts/discourse/templates/admin/plugins-explorer.hbs

@@ -33,6 +33,9 @@
           {{#if selectedItem}}
             {{#if editing}}
               <div class="name">
+                <div class="previous">
+                  {{d-button action="goBack" icon="chevron-left" class="no-text btn-med"}}
+                </div>
                 {{text-field value=selectedItem.name}}
               </div>
               <div class="desc">
@@ -40,6 +43,9 @@
               </div>
             {{else}}
               <div class="name">
+                <div class="previous">
+                  {{d-button action="goBack" icon="chevron-left" class="no-text btn-med"}}
+                </div>
                 <h2>{{selectedItem.name}}</h2>
                 {{d-button action="editName" icon="pencil" class="no-text btn-small"}}
               </div>

assets/stylesheets/explorer.scss

@@ -142,6 +142,12 @@
   .name h2 {
     display: inline-block;
   }
+  .name .previous {
+    padding: 0.2em;
+    display: inline-block;
+    padding-right: 0.25em;
+    font-size: 1.2em;
+  }
   .name input, .desc textarea {
     width: calc(100% - 10px);
   }