fix: snap unselected strokes using pointer tool

- UBBoardView::itemShouldBeMoved handled strokes and text the same
- text shall not be moved with the pointer tool in some situations
  so that the mouse can be used to mark text
- this however does not apply to strokes
- so for strokes return true regardless of tool and selection state
- note: before strokes have been moved anyway, but by using
  delegation of the event to QGraphicsView
- this code branch skipped snapping

src/board/UBBoardView.cpp

@@ -692,9 +692,9 @@ bool UBBoardView::itemShouldBeMoved(QGraphicsItem *item)
     case UBGraphicsMediaItem::Type:
     case UBGraphicsVideoItem::Type:
     case UBGraphicsAudioItem::Type:
+    case UBGraphicsStrokesGroup::Type:
         return true;
 
-    case UBGraphicsStrokesGroup::Type:
     case UBGraphicsTextItem::Type:
         if (currentTool == UBStylusTool::Play)
             return true;