App Polish (#1098)

* App polish

- Skeleton avatar colour on app switching.
- Bug report icon and string.
- Semi-bold font on room list timestamps.
- Room attachments button spacing and alignment.
- Replace link tint with semi-bold font in AnalyticsSettingsScreen.
- Semi-bold font on Invites button.
- Add padding to media attachment sheet.
- Message composer header layout tweaks.
- Remove indicator after changing homeserver with an MXID.
- Change copy permalink string.
- Formatting of link in Analytics Prompt.
- Remove indicator after changing homeserver with an MXID.
- Change copy permalink string.
- Formatting of link in Analytics Prompt.
- Only semi-bold the room timestamp when unread.
- Tweak the colour of the date separator.
- Add activity indicator to toast style user indicator.

ElementX/Sources/Screens/HomeScreen/View/HomeScreenRoomCell.swift

@@ -92,7 +92,7 @@ struct HomeScreenRoomCell: View {
             
             if let timestamp = room.timestamp {
                 Text(timestamp)
-                    .font(.compound.bodySM)
+                    .font(room.hasUnreads ? .compound.bodySMSemibold : .compound.bodySM)
                     .foregroundColor(room.hasUnreads ? .compound.textActionAccent : .compound.textSecondary)
             }
         }