tests/test-simplemerge.py.out

hgweb: add z-index for search field tooltip

On graph page, search field tooltip sometimes goes down to the graph area,
where it used to be covered by foreground element of graph entries (.fg)
because they have z-index: 10.

To prevent the tooltip from being covered, z-index: 15 is enough.

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Ran 16 tests in 0.000s

OK