fix: include decorations in visibleOnMonitor calculation (#11232)

Fixes: https://github.com/hyprwm/Hyprland/discussions/11203

The window turned invisible when just outside the monitor bounds, even though it should have stayed visible given its decorations.

The fix was to include the decorations when determining if a window is on a monitor.

src/desktop/Window.cpp

@@ -1261,6 +1261,9 @@ void CWindow::setSuspended(bool suspend) {
 bool CWindow::visibleOnMonitor(PHLMONITOR pMonitor) {
     CBox wbox = {m_realPosition->value(), m_realSize->value()};
 
+    if (m_isFloating)
+        wbox = getFullWindowBoundingBox();
+
     return !wbox.intersection({pMonitor->m_position, pMonitor->m_size}).empty();
 }