Change mouse pointer to "I" when hovering UITextEntryLine

[nb-programmer]

Is your feature request related to a problem? Please describe. No. This is an enhancement / useful feature

Describe the solution you'd like When the user Hovers over the UITextEntryLine element (i.e. edit text box), the mouse cursor should change to the "I" pointer (i.e. the CSS { cursor: text } cursor). Currently mouse pointer does not change.

Describe alternatives you've considered Parameter in the constructor, or a setter method to enable it (or enabled by default)

Additional context Tested on Pygame_gui version 0.6.4

[MyreMylar]

I've had a go at adding this so it should make it into the next version 0.6.5