Improve capitalization consistency in menus

Android uses sentence case. iOS uses title case.

_locales/en/messages.json

@@ -63,7 +63,7 @@
       "message": "Disconnected"
     },
     "submitDebugLog": {
-      "message": "Submit Debug Log",
+      "message": "Submit debug log",
       "description": "Menu item and header text for debug log modal, title case."
     },
     "searchForPeopleOrGroups": {
@@ -118,14 +118,14 @@
       "message": "Members"
     },
     "resetSession": {
-        "message": "Reset Session",
+        "message": "Reset session",
         "description": "This is a menu item for resetting the session, using the imperative case, as in a command."
     },
     "verifyIdentity": {
         "message": "Verify Identity"
     },
     "verifySafetyNumbers": {
-        "message": "Verify Safety Numbers"
+        "message": "Verify safety numbers"
     },
     "theirIdentity": {
         "message": "Their identity",
@@ -139,7 +139,7 @@
         "message": "You haven't exchanged any messages with this contact yet. Their identity will be available after the first message."
     },
     "deleteMessages": {
-        "message": "Delete Messages",
+        "message": "Delete messages",
         "description": "Menu item for deleting messages, title case."
     },
     "deleteConversationConfirmation": {

stylesheets/_ios.scss

@@ -64,6 +64,10 @@ $ios-border-color: rgba(0,0,0,0.1);
     }
     .avatar { display: none; }
   }
+  .settings h3,
+  .menu-list li {
+    text-transform: capitalize;
+  }
   .bottom-bar {
     padding: 15px;
     min-height: 30px;

stylesheets/manifest.css

@@ -1451,6 +1451,9 @@ li.entry .error-icon-container {
     line-height: 64px; }
   .ios .conversation-header .avatar {
     display: none; }
+.ios .settings h3,
+.ios .menu-list li {
+  text-transform: capitalize; }
 .ios .bottom-bar {
   padding: 15px;
   min-height: 30px;