Fix compilation of addon manuals for Windows

[ninsbl]

I changed several addons in order to make manual pages compile.
See compilation log here:
https://wingrass.fsv.cvut.cz/grass78/x86_64/addons/latest/logs/

Addons containing serval modules can have failed even though the log says differently... Would be great if you could check the addon you contributed to...

[neteler]

May this be merged?

[neteler]

This PR needs some rework concerning

grass7/imagery/i.sentinel/i.sentinel.download/i.sentinel.download.py

• I just messed up the panda lazy import trying to resolve the conflict (sorry)
• it seems to lack the merged PR i.sentinel.download: Enable downloading from Google Cloud #492

In essence, this is missing (in the right position):

try:
    from tqdm import tqdm
except ImportError as e:
    gs.fatal(_("Module requires tqdm library: {}").format(e))

I tried to locally fix it and push to this PR but failed (not enough git skills). @ninsbl can you pls take a look?

[neteler]

Gentle ping, @ninsbl - would you mind to rebase this PR (see above)?

[ninsbl]

@neteler OK to merge?

[neteler]

Thanks!