Fix activation of initial context

This broke with 40f6767cfc77; the symptom is that starting lazygit with a git
arg (e.g. "lazygit log") wouldn't activate the requested panel correctly. While
it would show in the expanded view, it didn't have a green frame, and keyboard
events would go to the files panel.

pkg/gui/gui_common.go

@@ -70,6 +70,10 @@ func (self *guiCommon) IsCurrentContext(c types.Context) bool {
 	return self.CurrentContext().GetKey() == c.GetKey()
 }
 
+func (self *guiCommon) ActivateContext(context types.Context) error {
+	return self.gui.activateContext(context, types.OnFocusOpts{})
+}
+
 func (self *guiCommon) GetAppState() *config.AppState {
 	return self.gui.Config.GetAppState()
 }

pkg/gui/layout.go

@@ -182,7 +182,7 @@ func (gui *Gui) onInitialViewsCreationForRepo() error {
 	}
 
 	initialContext := gui.currentSideContext()
-	if err := gui.c.PushContext(initialContext); err != nil {
+	if err := gui.c.ActivateContext(initialContext); err != nil {
 		return err
 	}
 

pkg/gui/types/common.go

@@ -45,6 +45,7 @@ type IGuiCommon interface {
 	CurrentContext() Context
 	CurrentStaticContext() Context
 	IsCurrentContext(Context) bool
+	ActivateContext(context Context) error
 	// enters search mode for the current view
 	OpenSearch()