GODT-1537: Manual in-app update mechanism.

internal/frontend/qt/qml_backend.go

@@ -81,6 +81,7 @@ type QMLBackend struct {
 	_ func()               `signal:"updateIsLatestVersion"`
 	_ func()               `slot:"checkUpdates"`
 	_ func()               `signal:"checkUpdatesFinished"`
+	_ func()               `slot:"installUpdate"`
 
 	_ bool                                                `property:"isDiskCacheEnabled"`
 	_ core.QUrl                                           `property:"diskCachePath"`
@@ -213,6 +214,13 @@ func (q *QMLBackend) setup(f *FrontendQt) {
 		}()
 	})
 
+	q.ConnectInstallUpdate(func() {
+		go func() {
+			defer f.panicHandler.HandlePanic()
+			f.installUpdate()
+		}()
+	})
+
 	f.setIsDiskCacheEnabled()
 	f.setDiskCachePath()
 	q.ConnectChangeLocalCache(func(e bool, d *core.QUrl) {