Some UI elements don't exit on LEFT where it's expected

[CRImier]

We have an informal UX guideline - UI elements need to exit on LEFT wherever possible. Some UI elements don't, however:

• [x] NumpadCharElement has to exit on LEFT if the value is empty (at least until we have a cursor implemented)
• [x] TextReader should exit on LEFT when horizontal scroll is in the leftmost position

[derivmug]

I have made some a small change to TextReader which makes it exit on LEFT when it's in the leftmost position. The changes are in the derivmug-matrix branch

[CRImier]

Thank you! Now, all that's left is the Numpad*Elements =)

[derivmug]

NumpadCharInput calls the following method on LEFT, so I believe this might be already implemented.

`

def deactivate_if_first(self):

""" Deactivates the UI element if it hasn't yet had a character entered """

if self.position == 0:

    self.deactivate()

`

[CRImier]

ohh. why wouldn't it work then? let me see

[CRImier]

Okay. Tested, and understood why it didn't work for me - this is fixed, thank you @derivmug =)