Add the ability to have instructions like remove section, control, setting in the config

[vladolaru]

Add the following capabilities:

• [x] remove panel (remove_panels key)
• [x] change panel properties (change_panel_props key)
• [x] remove section (remove_sections key)
• [x] change section properties (change_section_props key)
• [x] remove setting (remove_settings key)
• [x] change setting properties (change_setting_props key)
• [x] remove control (remove_controls key)
• [x] change control properties (change_control_props key)