move more actions into controller

pkg/gui/context/list_context_trait.go

@@ -15,6 +15,8 @@ type ListContextTrait struct {
 	getDisplayStrings func(startIdx int, length int) [][]string
 }
 
+func (self *ListContextTrait) IsListContext() {}
+
 func (self *ListContextTrait) GetList() types.IList {
 	return self.list
 }

pkg/gui/context/patch_explorer_context.go

@@ -45,6 +45,8 @@ func NewPatchExplorerContext(
 	}
 }
 
+func (self *PatchExplorerContext) IsPatchExplorerContext() {}
+
 func (self *PatchExplorerContext) GetState() *patch_exploring.State {
 	return self.state
 }