Adding fullscreen, holdbar and unfloatvisible patches

patch/fullscreen.c

@@ -0,0 +1,13 @@
+Layout *last_layout;
+
+void
+fullscreen(const Arg *arg)
+{
+	if (selmon->showbar) {
+		for (last_layout = (Layout *)layouts; last_layout != selmon->lt[selmon->sellt]; last_layout++);
+		setlayout(&((Arg) { .v = &layouts[2] })); // <-- NB! hardcoded monocle
+	} else {
+		setlayout(&((Arg) { .v = last_layout }));
+	}
+	togglebar(arg);
+}