fix: set initial size of widgets (#5794)

CHANGELOG.md

@@ -9,6 +9,7 @@
 - Bugfix: Fixed a crash relating to Lua HTTP. (#5800)
 - Bugfix: Fixed a crash that could occur on Linux and macOS when clicking "Install" from the update prompt. (#5818)
 - Bugfix: Fixed missing word wrap in update popup. (#5811)
+- Bugfix: Fixed tabs not scaling to the default scale when changing the scale from a non-default value. (#5794)
 - Dev: Updated Conan dependencies. (#5776)
 
 ## 2.5.2

src/widgets/BaseWidget.cpp

@@ -19,6 +19,7 @@ namespace chatterino {
 BaseWidget::BaseWidget(QWidget *parent, Qt::WindowFlags f)
     : QWidget(parent, f)
     , theme(getApp()->getThemes())
+    , scale_(this->scale())
 {
     this->signalHolder_.managedConnect(this->theme->updated, [this]() {
         this->themeChangedEvent();