Fix #16246 TreeTable Spacer Size Calculation #16273
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Defect Fixes
Fixes #16246
Commit e7b611 introduced a regression in the size calculation for
TreeTablecomponent with a"flex"height configuration. The issue arises because the spacer size is no longer being updated correctly. As a result, the scrollbar resizes itself during scrolling, which causes jumping of the scrollbar.I have replaced the window-size listener with a
ResizeObserver, because the number of visible items in aTreeTablewith virtual scrolling must get recalculated if the view size changes. The new observer should handle window size changes, important to theTreeTable, equally well.