Fix rendering of rows of RelatedChangesTab.

Tabs that are not currently selected have style display: none, which
causes them to have no layout. Just after a tab has been selected (and
made visible), registerKeys is enabled. Measure and potentially render
the rows when that occurs.

Change-Id: Ifd95d9deb558cf02d382a4c5041f9fa7f218676b
1 file changed