Rename "edit" to "select" for selecting messages

Close #1305

app/js/locales/en-us.json

@@ -432,7 +432,7 @@
 	"head_settings": "Settings",
 	"head_log_out": "Log out",
 	"head_peer_more": "More",
-	"head_edit_messages": "Edit messages",
+	"head_select_messages": "Select messages",
 	"head_media_photos": "Photos",
 	"head_media_video": "Videos",
 	"head_media_documents": "Files",
@@ -440,7 +440,7 @@
 	"head_media_search": "Search",
 	"head_about": "About",
 	"head_clear_all": "Clear history",
-	"head_edit": "Edit",
+	"head_select": "Select",
 	"head_typing": "typing",
 	"head_pluralize_participants": "{'0': 'No members', 'one': '1 member', 'other': '{} members'}",
 	"head_one_typing": "{name1} is typing{dots}",
@@ -471,7 +471,7 @@
 	"im_select_a_chat": "Please select a chat to start messaging",
 	"im_loading_history": "Loading history",
 	"im_info": "Info",
-	"im_edit": "Edit",
+	"im_select": "Select",
 	"im_media": "Media",
 	"im_media_photos": "Photos",
 	"im_media_video": "Videos",

app/partials/desktop/head.html

@@ -40,7 +40,7 @@
 
       <div ng-switch-default ng-if="!!historyPeer.id" class="tg_head_main_peer_wrap">
 
-        <a class="tg_head_btn tg_head_msgs_edit_btn" my-i18n="im_edit" ng-click="toggleEdit()"></a>
+        <a class="tg_head_btn tg_head_msgs_edit_btn" my-i18n="im_select" ng-click="toggleEdit()"></a>
 
         <div class="tg_head_peer_dropdown tg_head_peer_media_dropdown dropdown" dropdown>
           <a class="tg_head_btn dropdown-toggle" dropdown-toggle my-i18n="im_media"></a>

app/partials/mobile/head.html

@@ -19,7 +19,7 @@
           <li><a ng-click="logOut()" my-i18n="head_log_out"></a></li>
         </ul>
         <ul ng-switch-default class="dropdown-menu">
-          <li><a ng-click="toggleEdit()" my-i18n="head_edit_messages"></a></li>
+          <li><a ng-click="toggleEdit()" my-i18n="head_select_messages"></a></li>
           <li ng-if="!historyFilter.mediaType" class="divider"></li>
           <li ng-if="!historyFilter.mediaType"><a ng-click="toggleMedia('photos')" my-i18n="head_media_photos"></a></li>
           <li ng-if="!historyFilter.mediaType"><a ng-click="toggleMedia('video')" my-i18n="head_media_video"></a></li>
@@ -60,7 +60,7 @@
               <li class="navbar-quick-left">
                 <a ng-click="selectedFlush()" my-i18n="head_clear_all"></a>
               </li>
-              <li class="navbar-quick-title" my-i18n="head_edit"></li>
+              <li class="navbar-quick-title" my-i18n="head_select"></li>
             </ul>
             <ul ng-switch-default class="nav navbar-nav navbar-quick-nav" ng-switch="historyPeer.id > 0">
               <li ng-switch-when="true">