Upgraded and improved editor features

[rezaei92]

Hello,
It seems that due to issues and the absence of certain features in the editor, which have been frequently mentioned in various issues, it would be better to make changes and developments in this section and upgrade the Squire editor version along with it. Some of the issues include the lack of text alignment, problems with text direction, the inability to add text styles as inline CSS, issues with directly copying tables, and visual and display problems.

Therefore, implementing these changes will address many needs, especially for RTL languages. I would appreciate it if you could accept this PR to improve performance and provide more convenience for users.

[phsc84]

Great work, would love to give it a try!
Just a sidenote: Squire 2.3.2 is already out.

[rezaei92]

Great work, would love to give it a try! Just a sidenote: Squire 2.3.2 is already out.

Thanks for your feedback. I've done.

[the-djmaze]

Yes, it would be nice if Squire-RTE can be used.
However, there are several caveats why it is not used.
I will try to document them better, here https://github.com/the-djmaze/Squire/commits/snappymail/

But i also see you added DOMPurify.
Can you remove DOMPurify?

[rezaei92]

Thank you so much.
I removed it.

[the-djmaze]

Ok, Squire-RTE can't be used by default due to the important changes.
If you are missing something, see https://github.com/the-djmaze/Squire

A good example why SnappyMail uses a modified Squire is this issue #962

1. Drag&drop the attached email into a mailbox.
2. Open the email
3. Hit reply button

Now see the difference in speed with Squire-RTE and ours.

Feel free to create a new PR with only the RTL fixes.