Win_CBZ Beta release 0.21.166b

Bugfixes:

• Fixed not being able to delete metadata entry after sorting datagrid (#44)
• Fixed stuck glabal action/banner after undeleting a page from properties-dialog (#43)
• fix disabled contextmenu if multiple pages are selected
• fix not being able to edit multivalue separator column in settings

Misc:

• Add "Series" Field to validation, as Komga requires it, setting series title. If empty, nothing will be displayed

Frontend:

• adjust input style