Modification to fix #1898 - Embeds subtitle gives user the option to embed subtitle on screenshot or not

[WongChoice]

Modification to Fix #1898

What does this PR do?

This is a modification in continuation of PR #1899
Feature added :

1. Gives user the option to chose if they wish to have subtitle embedded on screenshot or not
   

2. Appends the caption text in the end of the screenshot file name
   

[ImprovedTube]

thanks @WongChoice.

edited it to include the subtitle in the file name always.

• to make this consistent, a final step for this feature can be that our screenshot does this independent of the subtitle being visible on the screen or not.

Please feel free to point me to any PR in future. thanks

there are several pretty relevant ones, that i wont delay if i find team or energy. (Looking forward to your email /requirements)

---

( also moved your switch here: )

(of course it can be linked at subtitles too /our menu could be dynamic 🤔)

thanks!