Fix window state handling

[alexiynew]

• Detect state changing by system:
  - switch to fullscreen by button in window title
  - switch to maximized by clicking on window title, and by button in title
  - iconify by button in window title
  - restore from iconified state does not handle properly
• When window is not resizable, switching to fullscreen do not update window graphic context, MacOS.
• Update grubbed cursor position when switch in\out fullscreen\maximized state. For now cursor stays in old position and first mouse move cause large position diff.
• When cursor is grabbed, dragging window title should not move cursor in the center of the window.
• When toggle cursor grabbed state, need correctly update cursor visibility. Sometimes it steel can be visible until first mouse move.
• When switching window state, need correctly update cursor visibility, when cursor goes in\out of the window.
• Iconified state sometimes does not release grabbed cursor
• Iconified state sometimes does not show cursor if it was hidden
• Fix cursor grabbing on linux
• Fix state tests on linux