New Geojson set import options for all imported files

I often import many files at ones, which generally works very well. The only annoyance I have, is that for each file I have to choose the file format, press import, and wait for it to load before I can set the options for the next file.

I am guessing that almost every time someone imports multiple files, they all have the same format, and choosing the format for each file individually is quite annoying.

I suggest you add a button along the lines of "Apply to all imported files" so that you do not have to wait and press the same button multiple times.

Start by tracing the multi-file import flow and the UI that asks for each file's format and options. Add an “Apply to all imported files” control so one selection can be reused without waiting through each import, then verify that multiple files receive the chosen settings.

Written by the indexing model from the issue text.