preloader with overlay: allow to be used in a specific part of the app #3499
Description
Is your feature request related to a problem? Please describe.
From what I understand, the preloader overlay will always cover the full screen. But there are situations where it would be useful to cover only one part of the screen / app.
For instance, if you click a button in the top and a grid is refreshed in the bottom, it would be very nice if the preloader overlay could cover only the grid container (the rest of the application should not be blocked).
Describe the solution you'd like
In the past I have used this useful lib and worked well: https://github.com/anseki/plain-overlay
It would be great if framework7 could support some features of plain-overlay, namely:
- "Cover all or part of a web page with an overlay."