Improve focus handling

* Display current focus window / process
 * Match against app name instead of window name on MacOS when using
   Process condition
 * Clean up

src/advanced-scene-switcher.cpp

@@ -280,6 +280,9 @@ void SwitcherData::setPreconditions()
 	}
 	currentTitle = title;
 
+	// Process name
+	GetForegroundProcessName(currentForegroundProcess);
+
 	// Cursor
 	std::pair<int, int> cursorPos = getCursorPos();
 	cursorPosChanged = cursorPos.first != switcher->lastCursorPos.first ||