vk: Build keymaps for popovers
We can make popovers work in virtual keyboard mode by submitting a small keymap for the popover. This would allow us to e.g. support diacritics for other languages in the German keymap and also make the "base keymaps" smaller as we'd not have to worry about the characters there (note to self char-popup-keymap branch)
Edited by Guido Günther