(feat) added replied/forwarded message status support + pimped UI a bit

UI/Templates/MailerUI/UIxMailEditor.wox

@@ -76,6 +76,21 @@
           </label>
           <input type="text" name="subject" ng-model="message.editable.subject"/>
         </md-input-container>
+
+        <div layout="row" layout-align="center center" ng-hide="hidePriority">
+          <span class="md-body-1">
+            <var:string label:value="Priority"/>
+          </span>
+          <md-slider flex="flex"
+                     md-discrete="md-discrete"
+                     ng-model="message.editable.priority"
+                     step="1"
+                     min="1"
+                     max="5"
+                     aria-label="rating">
+            <!-- priority -->
+          </md-slider>
+        </div>
         
         <div class="pseudo-input-container" ng-hide="hideAttachments">
           <label class="pseudo-input-label">
@@ -103,9 +118,16 @@
       <!-- TOOLBAR TO SHOW CC/BCC/ATTACHMENT FIELDS -->
       <div layout="column" layout-align="start end">
         <md-button  class="iconButton" ng-show="hideCc" ng-click="hideCc = false">Cc</md-button>
-        <md-button  class="iconButton" ng-show="hideBcc" ng-click="hideBcc = false">Bcc</md-button>
+        <md-button  class="iconButton" ng-show="hideBcc"
+                    ng-click="hideBcc = false">Bcc</md-button>
+        <md-button  class="iconButton" ng-show="hidePriority" ng-click="hidePriority = false">
+          <i class="md-icon-info-outline"><!-- show priority --></i>
+        </md-button>
         <md-button  class="iconButton" ng-show="hideAttachments" ng-click="hideAttachments = false">
-          <i class="md-icon-attach-file"><!-- delete tag --></i>
+          <i class="md-icon-attach-file"><!-- show attachment --></i>
+        </md-button>
+        <md-button  class="iconButton" ng-click="returnReceipt = !returnReceipt">
+          <i class="md-icon-receipt"><!-- return receipt --></i>
         </md-button>
       </div>