Fix bug #16347 (broken big editor brush area)

Now use a repeated overlay similar to the mouseover overlay.

data/game_config.cfg

@@ -98,6 +98,7 @@
         grid_bottom="terrain/grid-bottom.png"
         mouseover="misc/hover-hex.png"
         selected=""
+        editor_brush="editor/brush.png"
         unreachable="terrain/darken.png"
         linger="terrain/darken-linger.png"
 

src/editor/editor_display.cpp

@@ -82,6 +82,12 @@ void editor_display::draw_hex(const map_location& loc)
 				image::get_image("editor/selection-overlay.png", image::SCALED_TO_HEX)));
 		}
 
+		if (brush_locations_.find(loc) != brush_locations_.end()) {
+			static const image::locator brush(game_config::images::editor_brush);
+			drawing_buffer_add(LAYER_MOVE_INFO, loc, tblit(xpos, ypos,
+					image::get_image(brush, image::UNMASKED)));
+		}
+
 		if(loc == mouseoverHex_ && !game_config::images::mouseover.empty()) {
 			static const image::locator mouseover(game_config::images::mouseover);
 			drawing_buffer_add(LAYER_MOVE_INFO, loc, tblit(xpos, ypos,

src/game_config.cpp

@@ -83,6 +83,7 @@ namespace game_config
 			grid_bottom,
 			mouseover,
 			selected,
+			editor_brush,
 			unreachable,
 			linger,
 			// GUI elements
@@ -204,6 +205,7 @@ namespace game_config
 			grid_bottom = i["grid_bottom"].str();
 			mouseover = i["mouseover"].str();
 			selected = i["selected"].str();
+			editor_brush = i["editor_brush"].str();
 			unreachable = i["unreachable"].str();
 			linger = i["linger"].str();
 

src/game_config.hpp

@@ -89,6 +89,7 @@ namespace game_config
 			grid_bottom,
 			mouseover,
 			selected,
+			editor_brush,
 			unreachable,
 			linger,
 			// GUI elements