Load/import file from disk

[FloEdelmann]

In the "Load" dialog, you can currently load saved queries from the browser storage, from OSM, and from hard-coded examples. It would be helpful to be able to quickly load a file from disk here, too.

This could look similar to the "Saved Queries (osm.org)" section in that dialog: A button "Load file" in a new section "Load Query from file on disk". Clicking this button should open the browser's file chooser, if possible restricted to *.overpassql files (see also https://github.com/users/FloEdelmann/projects/2?pane=info) and *.txt (for backwards compatibility).

Unsupported file extensions should be restricted after submitting the file chooser.

See also

• https://github.com/tyrasd/overpass-turbo/pull/587 where the download file extension was changed to *.overpassql
• https://github.com/IEE-TUGraz/GridTool/issues/2#issuecomment-1436037992 where this suggestion was first raised

[simon04]

A possible implementation might want to use any of:

• https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/files and change event
• https://developer.mozilla.org/en-US/docs/Web/API/Window/showOpenFilePicker (not yet supported in Firefox)