This currently is not working perfectly. Sometimes the Visibility panel is "counted" when checking for existing settings panels, and other times it's not.
When a block has no settings, the Visibility panel causes the Settings tab to appear. This is not ideal. The panel should behave like the Advanced panel. When there are no settings, the panel should be moved to the Styles tab.
Fixes: #75
This currently is not working perfectly. Sometimes the Visibility panel is "counted" when checking for existing settings panels, and other times it's not.
When a block has no settings, the Visibility panel causes the Settings tab to appear. This is not ideal. The panel should behave like the Advanced panel. When there are no settings, the panel should be moved to the Styles tab.