[enh] Better icon for private message - fix #900

www/plugins/es/templates/message/lookup_lg.html

@@ -21,9 +21,9 @@
       <button class="button button-stable button-small-padding icon ion-loop" ng-click="load()">
       </button>
 
-      <button class="button button-calm icon ion-compose"
-              ng-click="showNewMessageModal()">
-        {{'MESSAGE.BTN_COMPOSE' | translate}}
+      <button class="button button-calm"
+              ng-click="showNewMessageModal()" translate>
+        MESSAGE.BTN_COMPOSE
       </button>
 
       <button class="button button-stable button-small-padding icon ion-android-more-vertical"

www/plugins/es/templates/wot/view_identity_extend.html

@@ -11,13 +11,13 @@
           class="button button-fab button-fab-top-left button-fab-hero mini button-stable spin"
           style="left: 88px;"
           ng-click="showNewMessageModal()">
-    <i class="icon ion-compose"></i>
+    <i class="icon ion-email"></i>
   </button>
 </ng-if>
 
 <!-- Buttons section -->
 <ng-if ng-if=":state:enable && extensionPoint === 'buttons'">
-  <button class="button button-stable button-small-padding icon ion-compose"
+  <button class="button button-stable button-small-padding icon ion-email"
           ng-disabled="loading"
           ng-click="showNewMessageModal()"
           title="{{'MESSAGE.BTN_WRITE' | translate}}">