Patch Changes

• #5850  c707267 - Cache the zoom pane extent so panning and pinching no longer force a synchronous layout.
• #5839  0c0cebc - Use correct fill color for bg pattern in dark mode
• #5851  56cf3b0 - Fix fitView with includeHiddenNodes ignoring hidden nodes that declare an intrinsic size (width/height/initialWidth/initialHeight) but were never measured
• #5845  a01bb6b - Check if parent node is in node lookup before clamp the position to prevent throwing an error.
• #5849  9b3f390 - Always fire onPanZoomEnd when onPanZoomStart was fired due to a pan-on-scroll wheel tick
• #5837  cdfcbeb - Check for element existence and type before checking property existence in node/edge typeguards.