Control and Alt are special in that they aren't expected to switch levels, and so don't need to change what characters are output.
Use in layouts by adding `modifier: Control` or `modifier: Alt` in place of `text: "foo"`.
The latching of the modifier will force the keyboard to emit raw key presses and prevent it from outputting text.
Locking is not determined by button state any more, but rather based on the view active at the moment. If pressing/locking a key results in the current view being active, the key is active. If locking a key results in the current view, the unlock view is activated.
Moved Cairo context usage to Rust, and rearranged ctx setup (position) to happen in one place.
Removed render calls that were overwritten on each draw call anyway.
This fixes some rendering things which would happen with multiple state-sharing buttons. It also removes some interfaces exposing rows, views, layouts, and buttons, bringing the code closer to removing them from the FFI entirely.
WIP
WIP: keymap generation test passes
meta: Update features and version
WiP: cargo.lock
WIP: don't crash
WIP: no outlines
parsing: New tests
WIP: base level works
WIP: remove old keyboard
symbols correctly input
WIP: lodaing files
WIP: fallback works
Valid fallback
Each Button has a KeyState, which may be shared with other buttons. The list of pressed and locked buttons is used as a list of keys, causing a search for the button in the current view.
