Text boxes are too tall

[Ralith]

e.g. the textbox example is consistently more than two lines tall, even when updated or initialized with one line of text or the empty string. A similar effect is visible in a column layout.

[Ralith]

The cursor is also too tall; see e.g.:

[Ralith]

Here's the same textbox initialized with three lines, with the cursor on the top line:

[LPGhatguy]

Found to be caused by scale factor not being part of some of the cursor math.

Fixed in cb45454dffaa41b1dddc3aadce4ac29a9a3d901f.