fix(web): error in floating osk view when no keyboard active
fix(web): error in floating osk view when no keyboard active

This fixes an issue that arises when loading the Keyman Developer Server
home page and there are registered keyboards, but no keyboards active.
The floating osk view would throw an exception because it would attempt
to set the title of the view from the active keyboard, which is `null`.

tavultesoft/keymanweb,tavultesoft/keymanweb