ConversationView: Add 'View All Media' menu item

_locales/en/messages.json

@@ -522,6 +522,9 @@
     "showSafetyNumber": {
       "message": "Show safety number"
     },
+    "viewAllMedia": {
+      "message": "View all media"
+    },
     "verifyHelp": {
       "message": "If you wish to verify the security of your end-to-end encryption with $name$, compare the numbers above with the numbers on their device.",
       "placeholders": {

background.html

@@ -159,6 +159,7 @@
               <button class='hamburger' alt='conversation menu'></button>
               <ul class='menu-list'>
                   <li class='disappearing-messages'>{{ disappearing-messages }}</li>
+                  <li class='view-all-media'>{{ viewAllMedia }}</li>
                   {{#group}}
                       <li class='show-members'>{{ show-members }}</li>
                       <!-- <li class='update-group'>Update group</li> -->