fix: do full update on invalidation and theme change (#6373)

* fix: update on invalidation and theme change

* changelog

---------

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

CHANGELOG.md

@@ -55,6 +55,7 @@
 - Bugfix: Fixed invalid commands from being forwarded to Helix, making it possible for information to leak (e.g. if you typed `/bann username ban reason` it would be seen by others in chat as `username ban reason`). (#6272, #6330)
 - Bugfix: Emotes that failed to load their images now show as text. (#6355)
 - Bugfix: Fixed a crash that occurs when searching for emotes in channel-less contexts. (#6357)
+- Bugfix: Fixed theme changes not instantly applying to messages. (#6373)
 - Bugfix: Fixed command triggers showing as '/...' when the value is longer than the column width. (#6369)
 - Bugfix: Fixed a crash that could occur when making HTTP requests from a timeout handler. (#6375)
 - Dev: Mini refactor of Split. (#6148)

src/widgets/helper/ChannelView.cpp

@@ -604,9 +604,9 @@ void ChannelView::themeChangedEvent()
     BaseWidget::themeChangedEvent();
 
     this->setupHighlightAnimationColors();
-    this->queueLayout();
     this->messageColors_.applyTheme(getTheme(), this->isOverlay_,
                                     getSettings()->overlayBackgroundOpacity);
+    this->invalidateBuffers();
 }
 
 void ChannelView::updateColorTheme()
@@ -659,6 +659,7 @@ void ChannelView::invalidateBuffers()
 {
     this->bufferInvalidationQueued_ = true;
     this->queueLayout();
+    this->update();
 }
 
 void ChannelView::queueLayout()