Inherit Button Theme Settings

[andeng1106]

Describe the bug
Compiled all the inherit theme button settings in one issue.

These are the ff. issues:

• [Blocksy] Inherit Buttons settings in Theme Customizer for Button blocks #2354
• Inherit the button styles of Blocksy and theme.json #3035
• Buttons not inhering theme settings #3057

[bfintal]

Already done in a previous version