Adds the ability to upload whole folders to dashboard

[bdirito]

Adds a new configuration option to dashboard browserUploadType

This can be set to files (default) folders or both. Relies on the webkitdirectory attribute on input elements. webkitdirectory is not officially standardized but support is widespread https://caniuse.com/#feat=input-file-directory.

This feature was slated for the 1.18 release.

[bdirito]

rebased off transloadit/uppy@master to fix merge conflict

[goto-bus-stop]

Thanks for the PR! This looks great. Just a few comments ⬇️

[bdirito]

@goto-bus-stop - updated for pr comments

[bdirito]

Made the relevant changes last week; however as im not sure of your preferred processes i also explicitly resolved the comments in github [just now].

[goto-bus-stop]

Sorry for not keeping you in the loop—I think this looks great code-wise, thanks!

I was still talking with @arturi about the option name…I think browserUploadType is maybe a little cryptic. We were thinking of something like selectionType, or something like fileBrowseType. The idea behind those suggestions is that the option affects what you can select / what you can browse for, but not really how they are being uploaded. How do you feel about those? Or perhaps there is yet another name we could pick?

[bdirito]

fair point. I think perhaps fileManagerSelectionType? That has the issue of including file in the option name when files is one of the possible values. On the otherhand the created interface on selecting the dashboard button for either of these things still a 'file manager'. Though I dont know if I care too much as to what the option name is. Just let me know what to go with and I'll get things updated for the new value.

[bdirito]

@goto-bus-stop @arturi

I ended up just going with browserUploadType -> fileManagerSelectionType just to get this moving. If you want something else let me know.

[goto-bus-stop]

@bdirito I think we're happy with that 😄 thanks again for the PR!