a serious bug when use Layout.Inst().PushDialogue(ProgressDialogue())

[bruceliu01]

#6

ProgressDialogue can display a task progress, but when we push this dialogue with PushDialogue, it can not work right because all progress dialogue add up together.
Actually, one progress is a dialogue. For example, %10 is a dialogue, %11 is a dialogue and so on.
If we use PushDialogue to push all the dialogue, one dialogue will on another. So we can not back to the menu with key "esc", because we just back to the last one progress dialogue!
The solution is write another push method for progress dialogue. The following is my pull request
20f42eb