Vertical tabs (#1815)

* Vertical tabs

* Vertical tab wrapping

* Fix formatting

* Cleanup code

* Updated changelog

* Hide button row if no buttons exist

* Fix tab width expansion

Co-authored-by: fourtf <tf.four@gmail.com>

src/widgets/helper/NotebookTab.hpp

@@ -51,6 +51,9 @@ public:
     QRect getDesiredRect() const;
     void hideTabXChanged();
 
+    void growWidth(int width);
+    int normalTabWidth();
+
 protected:
     virtual void themeChangedEvent() override;
 
@@ -98,6 +101,8 @@ private:
 
     bool isLive_{};
 
+    int growWidth_ = 0;
+
     QMenu menu_;
 
     std::vector<pajlada::Signals::ScopedConnection> managedConnections_;