AG Grid's horizontal scrollbar. It renders INSIDE the grid viewport, so when
columns overflow (the norm for wide related entities inside a form panel) an
unbudgeted bar eats the last row's height and clips it mid-glyph. Classic
scrollbars are 15–17px; overlay scrollbars cost the reserve as a little slack.
This is the FALLBACK reserve, used only by callers that do not measure the bar.
<mj-explorer-entity-data-grid> measures it from the DOM after layout and passes
the real height (0 when the columns fit, or on overlay-scrollbar platforms) as
scrollbarPx, which replaces this reserve entirely. Reserved only when rows are
shown — with zero rows there is no row to clip.
AG Grid's horizontal scrollbar. It renders INSIDE the grid viewport, so when columns overflow (the norm for wide related entities inside a form panel) an unbudgeted bar eats the last row's height and clips it mid-glyph. Classic scrollbars are 15–17px; overlay scrollbars cost the reserve as a little slack.
This is the FALLBACK reserve, used only by callers that do not measure the bar.
<mj-explorer-entity-data-grid>measures it from the DOM after layout and passes the real height (0 when the columns fit, or on overlay-scrollbar platforms) asscrollbarPx, which replaces this reserve entirely. Reserved only when rows are shown — with zero rows there is no row to clip.