Backport #27507 by @BLumia
This patch adds a hover background for the wiki row in wiki list page,
which make its behavior more close to repo's file list page.
This patch also make the wiki-git-entry visible on the row is hovered
instead of the cel, so users won't be confused since the 'grid' is not
visible from the web page.
After the patch: (when the wiki named 'Home' is hovered)
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Co-authored-by: Gary Wang <git@blumia.net>