(svn r21480) -Change [FS#4292]: make it possible to start actions that require selecting stuff (landscaping, vehicle cloning, etc) in the viewport while paused. As side-effect you'll get an error message explaining the command can't be executed because the game is paused instead of seemingly nothing happening when you click. Addition side effect of this is that you can make use of the measurement tooltip while paused

src/window.cpp

@@ -2213,36 +2213,6 @@ static void MouseLoop(MouseClick click, int mousewheel)
 			case MC_DOUBLE_LEFT:
 			case MC_LEFT:
 				DEBUG(misc, 2, "Cursor: 0x%X (%d)", _cursor.sprite, _cursor.sprite);
-				if (_thd.place_mode != HT_NONE && _pause_mode != PM_UNPAUSED && _game_mode != GM_EDITOR) {
-					switch (_settings_game.construction.command_pause_level) {
-						case CMDPL_ALL_ACTIONS:
-							/* We allow all actions. */
-							break;
-
-						case CMDPL_NO_LANDSCAPING:
-							if (_cursor.sprite == SPR_CURSOR_CLONE_TRAIN ||
-									_cursor.sprite == SPR_CURSOR_CLONE_ROADVEH ||
-									_cursor.sprite == SPR_CURSOR_CLONE_SHIP ||
-									_cursor.sprite == SPR_CURSOR_CLONE_AIRPLANE) {
-								/* Cloning is allowed. */
-								break;
-							}
-							/* FALL THROUGH */
-						case CMDPL_NO_CONSTRUCTION:
-							if (_cursor.sprite == SPR_CURSOR_SIGN ||
-									(_cursor.sprite >= SPR_CURSOR_PICKSTATION_FIRST && _cursor.sprite <= SPR_CURSOR_PICKSTATION_LAST)) {
-								/* Building signs or making orders is allowed. */
-								break;
-							}
-							/* FALL THROUGH */
-						case CMDPL_NO_ACTIONS:
-							if (_cursor.sprite == SPR_CURSOR_QUERY) break;
-
-							/* All other ones are not allowed to build. */
-							return;
-					}
-				}
-
 				if (!HandleViewportClicked(vp, x, y) &&
 						!(w->flags4 & WF_DISABLE_VP_SCROLL) &&
 						_settings_client.gui.left_mouse_btn_scrolling) {