Cleanup and refactor x11 code

- Deleted X11 code for an unfinished/broken feature
- Rename xtra -> x11focus
- Cleanup the remaining code a bit

src/x11focus.h

@@ -0,0 +1,34 @@
+/*  xtra.h
+ *
+ *
+ *  Copyright (C) 2020 Toxic All Rights Reserved.
+ *
+ *  This file is part of Toxic.
+ *
+ *  Toxic is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Toxic is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Toxic.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef X11FOCUS_H
+#define X11FOCUS_H
+
+#include <stdbool.h>
+
+/* NOTE: If no xlib present don't compile */
+
+int               init_x11focus(void);
+void              terminate_x11focus(void);
+bool              is_focused(void);
+
+#endif /* X11FOCUS */