Customize Product Category for WPBakery Page Builder 5.2.0

- Clean code.
- Refactor Code & Files.
- Added: Verify Purchase Code.
- Fixed: Some CSS bugs.
- Fixed: Some small bugs.
- Moved: Archive Templates submenu into MysteriousTeam menu.

- Refactor Code, Folders, Files,...
- Added: Hooks support a few themes.
- Fixed: Some small bugs.
- Fixed: Template not save.

- Removed: Row stretch option in Archive Header element.
- Fixed: line height not working on Category Name element.
- Fixed: Compatible with Salient theme.
- Fixed: The footer is not displaying on Salient theme.
- Fixed: Compatible with The7 theme.
- Fixed: generate_styles (Salient theme) not working on Category templates.
- Added: Category Thumbnail element.
- Added: Header and Footer Hooks for product category WPBakery Page Builder.