Verification button

[ShalokShalom]

There are some minor issues here with the verification:

1. https://vimeo.com/200539827

There are two possible ways, into which this issue can lead, when the verify button get hit now:

a) First one is, that the verification will fail.
b) Second case is that "No Flash USB detected" pops up, even when there is still one mounted.

Both is a little bit confusing, imho.

I do not remember currently, how to produce them in each case - i thought its maybe related to which stick is selected and which one unmounted, which seems not to be the case.

2. The unmounted stick(s) stay in the drop down menu, even when the reload button get hit.

3. This text here is currently not available in Transifex:

Verifying the integrity of the USB in comparison to
the downloaded ISO, this can take a few minutes

ISO files do not match, do not use this USB for install media.
Or make sure only one USB flash device is connected and run Verify again.

No Flash USB detected.