Editor Brushes: Replaced the ugly red border marker with a radio button

behaviour.

data/core/editor/brushes.cfg

@@ -3,7 +3,7 @@
 
 [brush]
     name= _ "Single Hex"
-    image="editor/brush-1.png"
+    image="editor/brush-1"
     [relative]
         x=0
         y=0
@@ -13,7 +13,7 @@
 [brush]
     radius=1
     name= _ "Radius 1 Hex"
-    image="editor/brush-2.png"
+    image="editor/brush-2"
     [relative]
         x=0
         y=0
@@ -23,7 +23,7 @@
 [brush]
     radius=2
     name= _ "Radius 2 Hex"
-    image="editor/brush-3.png"
+    image="editor/brush-3"
     [relative]
         x=0
         y=0
@@ -44,7 +44,7 @@
         y=0
     [/relative]
     name= _ "Hex Line NW-SE"
-    image="editor/brush-nw-se.png"
+    image="editor/brush-nw-se"
 [/brush]
 
 [brush]
@@ -60,7 +60,7 @@
  		x=0
  	[/relative]
  	name= _ "Hex Line SE-NW"
-         image="editor/brush-se-nw.png"
+    image="editor/brush-se-nw"
 [/brush]
 
 # [brush]

src/editor/toolkit/brush_bar.cpp

@@ -100,6 +100,8 @@ void brush_bar::draw(bool force) {
 	surface screen = gui_.video().getSurface();
 	for (size_t i = 0; i < brushes_.size(); i++) {
 		std::string filename = brushes_[i].image();
+		filename += ( i == selected_brush_size() ?
+				"-pressed.png" : ".png" );
 		surface image(image::get_image(filename));
 		if (image == NULL) {
 			ERR_ED << "Image " << filename << " not found." << std::endl;
@@ -111,12 +113,6 @@ void brush_bar::draw(bool force) {
 		}
 		SDL_Rect dstrect = create_rect(x, gui_.brush_bar_area().y, image->w, image->h);
 		sdl_blit(image, NULL, screen, &dstrect);
-		const Uint32 color = i == selected_brush_size() ?
-			SDL_MapRGB(screen->format,0xFF,0x00,0x00) :
-			SDL_MapRGB(screen->format,0x00,0x00,0x00);
-		//TODO fendrin
-		//draw_rectangle(dstrect.x -1, dstrect.y -1, image->w +2, image->h+2, color, screen);
-		draw_rectangle(dstrect.x, dstrect.y, image->w, image->h, color, screen);
 		x += image->w + brush_padding_;
 	}
 	update_rect(loc);