Fix text selection color of outgiong message bubble contents

This will change the text color and the background color of selected
text in outgoing messages to make the selection more noticeable.

::selection and ::-moz-selection have to be seperated into two
selectors because browsers will ignore selectors with partially
unknown syntax.

stylesheets/_conversation.scss

@@ -237,6 +237,18 @@
         right: -8px;
         border-left: 8px solid $blue;
       }
+
+      .content {
+        &::selection {
+          color: $grey_d;
+          background: white;
+        }
+
+        &::-moz-selection {
+          color: $grey_d;
+          background: white;
+        }
+      }
     }
   }
 

stylesheets/manifest.css

@@ -669,6 +669,14 @@ input.search {
     .message-list .outgoing .bubble::after {
       right: -8px;
       border-left: 8px solid #2090ea; }
+    .message-detail .outgoing .bubble .content::selection,
+    .message-list .outgoing .bubble .content::selection {
+      color: #454545;
+      background: white; }
+    .message-detail .outgoing .bubble .content::-moz-selection,
+    .message-list .outgoing .bubble .content::-moz-selection {
+      color: #454545;
+      background: white; }
   .message-detail .control .bubble .content,
   .message-list .control .bubble .content {
     font-style: italic; }