New features/fixes

Submenus - currently works best only in new Sky theme - you can customize your theme to display submenus
Option to hide alerts until logging out
Force HTTPS option in Settings
Option to have a template for each page
Save confirmation popup option in Settings (optional forcing to confirm every changes made by admin)
New deault theme Sky
Fix to check if imported repository is main or master branch
Fix for deleting default page
Fix for updating homepage if that one is a subpage
Fix for resetting array key of menu item
Other minor improvements and bugfixes

How to update

Log into your WonderCMS website and click "Update". If update isn't visible, open Settings -> Themes and click "Check for updates".
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