Improve usability of the new TextField

[marchermans]

The new TextField

• [ ] #19

When #19 is finished:

The textfield will support basic MineCraft 1.12 Written Book style edition (no cursor movement no selection). This is of course a dearly needed feature. To support this we need to make some change to the Client interception of UI input.

Required changes:

• [ ] Intercept special KeyInputs (like CTRL + V, and CTRL + C) on the client side and process them.
• [ ] Add support for cursor positioning (move the cursor by clicking) on the client side due to the requirement of the FontRenderer.
• [ ] Intercept special KeyInputs (like Left-Arrow, Right-Arrow) on the server side and process it accordingly.
• [ ] Add support for selection. Just as with cursor movement selection requires MouseInput to be tracked on the Client side.
• [ ] Add support for SpecialKey input syncing. Track SHIFT, CTRL and other special keys when messages are send to the server.
• [ ] Add support for special special KeyInput selection (like SHIFT+Left Arrow). This can be processed on the server side.