Add back button to configuration page.

cmd/passgo-gui/main.go

@@ -326,6 +326,13 @@ func eventLoop() {
 		Color:      black,
 		Background: gray,
 	}
+	backBtn := &Button{
+		Face:       face,
+		Label:      "back",
+		Alignment:  text.End,
+		Color:      black,
+		Background: gray,
+	}
 
 	anim := &time.Ticker{}
 	animating := false
@@ -422,9 +429,21 @@ func eventLoop() {
 		cs = flex.Rigid()
 		al := &layout.Align{Alignment: layout.E}
 		cs = al.Begin(ops, cs)
-		dims = saveBtn.Layout(c, q, ops, cs)
+		btnflx := &layout.Flex{Axis: layout.Horizontal}
+		btnflx.Init(ops, cs)
+		cs = btnflx.Rigid()
+		bc1 := btnflx.End(backBtn.Layout(c, q, ops, cs))
+		cs = btnflx.Rigid()
+		bc2 := btnflx.End(saveBtn.Layout(c, q, ops, cs))
+		dims = btnflx.Layout(bc1, bc2)
 		c4 := flex.End(al.End(dims))
 		flex.Layout(c1, c2, c3, c4)
+		if backBtn.Clicked() {
+			log(Info, "Back")
+			storeDirEd.SetText(store.Dir)
+			w.Invalidate()
+			page = listPage
+		}
 		if saveBtn.Clicked() {
 			log(Info, "Save")
 			go func() { // do not block UI thread
@@ -434,6 +453,7 @@ func eventLoop() {
 				saveConf()
 				reload <- struct{}{}
 			}()
+			w.Invalidate()
 			page = listPage
 		}
 	}