Editing a message bumps the room up in the room list.

**Steps to reproduce**
- Start with the following room list:
```
RoomA: LastMessageA@11AM
RoomB: LastMessageB@10AM
```
- Edit `LastMessageB` at say 12PM.

**Expected outcome**
- No changes, the room list should remain the same.

**Actual outcome**
- RoomA and RoomB are now swapped in the room list so it looks like this:
```
RoomB: LastMessageB@10AM
RoomA: LastMessageA@11AM
```

| An example in Element X iOS |
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