Freeciv

Spun off from #1293
Changes mostly to Qt client, items 2 & 5 are changes to GTK clients.

1
Unit menu item un(S)entry all on tile
Is Ctrl/Meta Shift D in Qt
"shift+s" is GTK only, Qt uses it for multiplayer_menu item "Set/Unset rally point",
and could use "shift+r" instead.

2
Qt has Ctrl/Meta F "Toggle city full bar visibility",
GTK View menu item "City Full Bar" lacking shortcut key,
because Ctrl/Meta F is GTK "Find City" menu item. GTK could use
Ctrl/Meta C for "Find _City" and then use Ctrl/Meta F for
"City _Full Bar" kike Qt.

3
Qt missing Meta-T shortcut for "Tax Rates..." menu item

4
Qt missing Shift-G shortcut for "Revolution" menu item

5
Qt has Ctrl/Meta + shift + J "Load Lua script"
GTK has menu item "Client _Lua Script" with no shortcut.

6
z: select only first unit of selected group
is shift+z in qt

7
Ctrl-Y: show/hide city outlines
Qt lacking this shortcut key.