Support to upload multiple folders at a time using 'Upload Folder' dialog

[v-xuanzh]

Storage Explorer Version: 1.7.0_20190401.1
Platform/OS: Linux Ubuntu/macOS High Sierra/Windows 10
Architecture: ia32/x64
Regression From: Not a regression

Actually:
We can drag multiple folders at the same time to one blob container/file share. And the selected folders can be uploaded successfully.

Suggestion:
Can we support to upload multiple folders using 'Upload Folder' dialog?

[MRayermannMSFT]

Based on our current knowledge this is only possible on non-Windows OSs. Windows file explorer limits us to selecting 1 folder at a time. Will leave it that way for all platforms for now for consistency. Will revisit if customers ask for this as well.

[kshah-mindovermachines]

This functionality would be extremely helpful!

[luconsta]

Unfortunately "drag & drop" option is not so obvious... I had to use "Upload folder" button couple of times until I've google it and found that is there a better way. :)