Hide avatar tooltips for broken thumbnails

TODO.md

@@ -19,6 +19,7 @@
   - EventLink
     - Special treatment for matrix.to URLs?
   - EventFile & Downloading (right click on media > save as...)
+  - Prevent using upload keybinds in rooms with no perms
 
 - Refactoring
   - Use a singleton for utils.js

src/qml/Base/HAvatar.qml

@@ -57,7 +57,9 @@ Rectangle {
 
         HToolTip {
             id: avatarToolTip
-            visible: (toolTipSourceOverride || toolTipMxc) &&
+            visible: ! avatarImage.broken &&
+                     avatarImage.status !== Image.Error &&
+                     (toolTipSourceOverride || toolTipMxc) &&
                      hoverHandler.hovered
             delay: 1000
             backgroundColor: theme.controls.avatar.hoveredImage.background