Fixes issue where the screen's tiles weren't being reset when a compo…

…nent was removed from the screen. So, you would see the component even after it was removed.

src/com/valkryst/VTerminal/Screen.java

@@ -457,6 +457,22 @@ public void removeComponent(final Component component) {
         for (final EventListener listener : component.getEventListeners()) {
             removeListener(listener);
         }
+
+        // Reset all of the tiles where the component used to be.
+        final int startX = component.getTiles().getXPosition();
+        final int startY = component.getTiles().getYPosition();
+
+        final int endX = startX + component.getTiles().getWidth();
+        final int endY = startY + component.getTiles().getHeight();
+
+        for (int y = startY ; y < endY ; y++) {
+            for (int x = startX ; x < endX ; x++) {
+                final Tile tile = tiles.getTileAt(x, y);
+                tile.reset();
+                tile.setBackgroundColor(colorPalette.getDefaultBackground());
+                tile.setForegroundColor(colorPalette.getDefaultForeground());
+            }
+        }
     }
 
     /** Removes all components from the screen. */