Fix tooltips appearing too large and/or away from the cursor (#4920)

src/singletons/WindowManager.hpp

@@ -122,10 +122,6 @@ public:
 
     pajlada::Signals::NoArgSignal wordFlagsChanged;
 
-    // This signal fires every 100ms and can be used to trigger random things that require a recheck.
-    // It is currently being used by the "Tooltip Preview Image" system to recheck if an image is ready to be rendered.
-    pajlada::Signals::NoArgSignal miscUpdate;
-
     pajlada::Signals::Signal<Split *> selectSplit;
     pajlada::Signals::Signal<SplitContainer *> selectSplitContainer;
     pajlada::Signals::Signal<const MessagePtr &> scrollToMessageSignal;
@@ -159,7 +155,6 @@ private:
     pajlada::SettingListener wordFlagsListener_;
 
     QTimer *saveTimer;
-    QTimer miscUpdateTimer_;
 
     friend class Window;  // this is for selectedWindow_
 };