TextEdit text is not clipped into content margin.

[Shadowblitz16]

Godot version:
3.2.3

OS/device including version:
Windows 10 ltsc 64 bit

Issue description:
The TextEdit text is not clipped to the styles content margin on a per pixel basis.

Steps to reproduce:

• create a theme
• add all text edit items
• set the style for normal so that it has really small content margin
• apply theme to text edit
• run project and see that the scrollbar is limited to it but not the text drawn.

Minimal reproduction project:
FocusBug.zip

[Shadowblitz16]

this seems to be with dialog too
this is what it does...

what it should be...

[Repiteo]

It's possible this wasn't fixed by the above issue, but it's hard to tell from such a limited report. If there's a deeper context to be assigned, it should be handled in a separate, more verbose issue