buggy RTL support

[heisamann]

Describe the bug
when writing in Arabic, the text is not flowing from right to left. and it is not possible to edit arabic text or writing arabic notes.

To Reproduce
Steps to reproduce the behavior:

1. write a text in Arabic.
2. highlight the text paragraph, and click on the right mouse button.
3. from the contextual menu choose writing direction.
4. chose Paragraph -> Right to Left.
5. the text will now correctly flow from right to left, but once you try to edit something in the text, it jumps back to the wrong flow.

Expected behavior
Arabic is a right to left language, and text should flow from right to left.

Actual behavior
Arabic text flows in the wrong direction, which makes it impossible to edit or write in Arabic.
Desktop (please complete the following information):

• OS: macOS
• OS version: 10.15.5
• FSNotes version: 4.5.6