[BUG] Can't delete Header / Query in Compose

[NghiaTranUIT]

🐶 Brief

There are few users reports that we couldn't delete headers/queries rows in Compose or Edit&Replay.

We have to fix it.

👑 Criteria

• Able to delete selected rows in Header / Query
• Delete by clicking on button �

[NghiaTranUIT]

All done 👍

🤯 Changelogs

• Support delete func for Header / Query in Compose screen
• Update warning icons, proxyman File Type
• Fix darktheme, font properties (font size, font name, height line, ...) in both theme in CodeMirror
• Disable saving warning after quitting app