Don't use Animators for ListView transitions

They're buggy

TODO.md

@@ -33,6 +33,7 @@
     - Reducable room sidepane, swipe to show full-window
 
 - Fixes
+  - Quickly posting with another account leads to sync stop
   - CPU usage
   - `code` not colored in room subtitle
   - In the "Leave me" room, "join > Hi > left" aren't combined

requirements.txt

@@ -6,7 +6,7 @@ aiofiles       >= 0.4.0, < 0.5
 appdirs        >= 1.4.3, < 2
 filetype       >= 1.0.5, < 2
 html_sanitizer >= 1.7.3, < 2
-lxml           >= 4.4.1, < 5
+lxml           >= 4.4.2, < 5
 mistune        >= 0.8.4, < 0.9
 dataclasses    >= 0.6,   < 0.7; python_version < "3.7"
 pyfastcopy     >= 1.0.3, < 2;   python_version < "3.8"

src/python/errors.py

@@ -1,5 +1,4 @@
 from dataclasses import dataclass, field
-from typing import Optional
 
 import nio
 

src/qml/Base/HListView.qml

@@ -29,30 +29,25 @@ ListView {
         visible: listView.interactive || ! listView.enableFlicking
     }
 
-    // FIXME: HOpacityAnimator creates flickering
-
     add: Transition {
         ParallelAnimation {
-            HNumberAnimation { property: "opacity"; from: 0; to: 1 }
-            HXAnimator { from: 100 }
-            HYAnimator { from: 100 }
+            HNumberAnimation { property:   "opacity"; from: 0; to: 1 }
+            HNumberAnimation { properties: "x,y";     from: 100 }
         }
     }
 
     move: Transition {
         ParallelAnimation {
             // Ensure opacity goes to 1 if add/remove transition is interrupted
-            HNumberAnimation { property: "opacity"; to: 1 }
-            HXAnimator {}
-            HYAnimator {}
+            HNumberAnimation { property:   "opacity"; to: 1 }
+            HNumberAnimation { properties: "x,y" }
         }
     }
 
     remove: Transition {
         ParallelAnimation {
-            HNumberAnimation { property: "opacity"; to: 0 }
-            HXAnimator { to: 100 }
-            HYAnimator { to: 100 }
+            HNumberAnimation { property:   "opacity"; to: 0 }
+            HNumberAnimation { properties: "x,y";     to: 100 }
         }
     }