== Sculpt ==

Fixed brush icons loading slowly

* Changed brush icon property from an enum to a flag that toggles whether a custom file is used for the brush icon
* Changed get_brush_icon to only handle loading external icons, built-ins are handled through the regular icon system
* Modified preview icon drawing to allow built-in icons
* When not using a custom icon, a default icon is selected based on the current tool

TODO:
* Allowing preview to show built-in icons makes the brush texture selector look ugly when nothing is selected. As discussed on IRC though, the nothing-selected state needs to be clarified anyway; I'll address this in another commit
* Use image browser when selecting a custom icon
* Selecting the default icon is ugly (uses the active object's mode), this can be fixed by making brushes know which paint mode they are part of

source/blender/editors/interface/interface_widgets.c

@@ -747,11 +747,7 @@ static void widgetbase_draw(uiWidgetBase *wtb, uiWidgetColors *wcol)
 static void widget_draw_preview(BIFIconID icon, float aspect, float alpha, rcti *rect)
 {
 	int w, h, x, y, size;
-	
-	/* only display previews for actual preview images .. ? */
-	if (icon < BIFICONID_LAST)
-		return;
-	
+
 	w = rect->xmax - rect->xmin;
 	h = rect->ymax - rect->ymin;
 	size = MIN2(w, h);