Fullscreen and Hide Filters floated in their own block over the map's
top-right corner, separate from the filter bar they sit beside.
Put them at the right-hand end of the bar, behind a separator. What made
this awkward before is that Hide Filters cannot live inside the thing it
hides, so the collapse now applies to the filters alone: the bar keeps its
two controls and shrinks to them at the map's right edge, leaving the whole
map visible and the way back one click away.
Fixes#38
Signed-off-by: Stan Grams <sjg@haxx.space>
sjg
88d04253ca