Fix background on mobile photo upload with dark theme

closes #7278

Changelog.md

@@ -11,6 +11,7 @@
 * Prevent scroll to top when clicking 'mark all as read' in the notification dropdown [#7253](https://github.com/diaspora/diaspora/pull/7253)
 * Update existing notifications in dropdown on fetch [#7270](https://github.com/diaspora/diaspora/pull/7270)
 * Fix link to post on mobile photo page [#7274](https://github.com/diaspora/diaspora/pull/7274)
+* Fix some background issues on dark mobile themes [#7278](https://github.com/diaspora/diaspora/pull/7278)
 
 ## Features
 * Add links to the aspects and followed tags pages on mobile [#7265](https://github.com/diaspora/diaspora/pull/7265)

app/assets/stylesheets/mobile/mobile.scss

@@ -733,7 +733,7 @@ select#aspect_ids_ {
 #publisher_textarea_wrapper {
   border-radius: 2px;
   margin: 12px 0px;
-  background: #fff;
+  background: $framed-background;
   position: relative;
   padding-right: 10px;
 
@@ -766,7 +766,7 @@ select#aspect_ids_ {
 
   &.with_attachments {
     padding-bottom: 55px;
-    border: 1px solid #CCCCCC;
+    border: 1px solid $border-medium-grey;
   }
 
   #photodropzone {