Revert "core: dispatch on exit instead of roundtrip" (#114)

This reverts commit 2c7027d.
Without the roundtrip it was possible that session_lock_surface_destroy gets called before unlock_and_destroy is processed.

src/core/hyprlock.cpp

@@ -725,7 +725,7 @@ void CHyprlock::unlockSession() {
     m_bTerminate = true;
     m_bLocked    = false;
 
-    wl_display_dispatch(m_sWaylandState.display);
+    wl_display_roundtrip(m_sWaylandState.display);
 }
 
 void CHyprlock::onLockLocked() {