Fix resizing logic (taskbar_distribute_size was broken, resizing triggered unnecessary redraws)

src/util/area.c

@@ -392,6 +392,8 @@ void hide(Area *a)
 {
 	Area *parent = (Area *)a->parent;
 
+	if (!a->on_screen)
+		return;
 	a->on_screen = FALSE;
 	if (parent)
 		parent->resize_needed = TRUE;
@@ -405,10 +407,13 @@ void show(Area *a)
 {
 	Area *parent = (Area *)a->parent;
 
+	if (a->on_screen)
+		return;
 	a->on_screen = TRUE;
 	if (parent)
 		parent->resize_needed = TRUE;
 	a->resize_needed = TRUE;
+	panel_refresh = TRUE;
 }
 
 void update_dependent_gradients(Area *a)

src/util/area.h

@@ -172,6 +172,7 @@ typedef struct Area {
 	int posx, posy;
 	// Size, including borders
 	int width, height;
+	int old_width, old_height;
 	Background *bg;
 	// Each element is a pointer to a GradientClass (list can be empty), no ownership
 	GList *gradients;