Library shouldn't print anything when things are working correctly.

- Changed XEvent and XPropertyChange when fullscreen var is false.
- Not 100% sure this is the right way, but seems to work better then befor.
Remaining TODO:
- Fix Title disappearing after fullscreen leave.
- Restore window size after fullscreen leave.

- added XResizeWindow symbole to libx11.rs
- implemented set_window_size fn to linux_x11.rs

when XC_left_ptr is not the default System pointer.
- Added XUndefineCursor to libx11.rs
- Changed to calling XUndefineCursor, when calling set_cursor with CursorIcon::Default

and window_restored_event for linux_x11 and wasm.
These events will be called on focus change events.
The names of this events are maybe not the best,
but I think this way is better then implementing a new event?!
changes:
- added extern fn focus in wasm.rs
- added a call to this fn in gl.js
- added calls from XEvent 9 and 10 to the window_events