Refactor out a distinct BoundPanelGroup class to replace the bound version of PanelGroup
Refactor out a distinct BoundPanelGroup class to replace the bound version of PanelGroup

wagtail/wagtail,rsalmaso/wagtail,thenewguy/wagtail,zerolab/wagtail,thenewguy/wagtail,rsalmaso/wagtail,zerolab/wagtail,wagtail/wagtail,wagtail/wagtail,rsalmaso/wagtail,thenewguy/wagtail,thenewguy/wagtail,rsalmaso/wagtail,rsalmaso/wagtail,thenewguy/wagtail,zerolab/wagtail,zerolab/wagtail,wagtail/wagtail,zerolab/wagtail,wagtail/wagtail