[Feat]: URL query parameter enhancements

[international-omelette]

Query parameters are a very important element of creating interactive & dynamic apps. Many times, I'm using id={{item.id}} when opening another app.
Right now, there are some things that should & could be better:

• Query params are not accessible to queries on page load. If I want to use query params to load data, I need to work around this issue with a data responder. See the attached app for an example: Query param page load issue(1).json
• Query params should persist on mode switch (at least from edit to preview mode; maybe even edit to publish mode). This may seem like a convenience feature but on an app that uses query params, having to go to the url bar and adding the query params everytime I preview an app is very annyoing.
• Make query params editing a ui feature. Maybe even let the user set default params for the edit mode. Definitely a convenience feature but it may also set the stage for making query params more accessible to less technical people.

[FalkWolsky]

Thank you very much for your good description! We checked it and agree, the URL query values have to be ready before we trigger Data Queries. About visual editing of Query parameters... You did have seen and use "gotoAPP", where we actually have this visual editor for Query Params? Or do you refer to a visual editor in the Data Query section?