Fix #3: suppress status tips from playlist dock when floating

[struktured]

Closes #3

Summary

When the preset playlist dock widget is undocked and moved to a second screen (typical "beamer/projector + control monitor" setup), hovering over preset items causes the info text to appear in the main window's status bar — on the wrong screen. The user wants the info to stay with the playlist window or not show at all on the visualization screen.

Fix

Install an event filter on presetPlayListDockWidget and the tableView that consumes QEvent::StatusTip when the dock is floating. The events would otherwise propagate up the QObject parent chain to the main window's status bar.

Tooltips (the floating yellow popup boxes) still work normally and follow the cursor to the correct screen via Qt's window manager hints.

Test plan

• Clean build
• Dual-monitor: undock playlist, drag to second screen, hover over presets — main window's status bar no longer shows the hover text (needs manual verification on a multi-monitor system)
• Tested locally end-to-end (dual-monitor: undock playlist, move to second screen, hover over presets, verify main window's status bar stays empty)

[Copilot]

Pull request overview

This PR addresses issue #3 where hovering over items in a floating preset playlist dock causes status tip text to appear in the main window’s status bar (potentially on the wrong screen in multi-monitor setups).

Changes:

• Installs an event filter on the preset playlist dock widget and its table view.
• Consumes QEvent::StatusTip events when the dock is floating to prevent propagation to the main window status bar.

Comments suppressed due to low confidence (1)

src/common/qprojectm_mainwindow.cpp:1430

• eventFilter() uses C-style casts ((QMouseEvent*)event) when handling mouse events. Since this is C++ and the cast is easy to tighten, prefer static_cast<QMouseEvent*>(event) (or auto* mouseEvent = static_cast<QMouseEvent*>(event) once) to avoid the broader semantics of C-style casts and improve readability.

	if (event->type() == QEvent::MouseButtonDblClick && ((QMouseEvent*)event)->button() == Qt::LeftButton) {
		this->setWindowState ( this->windowState() ^ Qt::WindowFullScreen );
		return true;
	} else if (event->type() == QEvent::MouseButtonPress && ((QMouseEvent*)event)->button() == Qt::RightButton) {
		setMenuVisible(!_menuVisible);

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