linstor interactive: can't add options with space inside or leading minus

[ggzengel]

This works:
linstor rg sp zfs_12 StorDriver/ZfscreateOptions "-o volblocksize=16k"
LINSTOR ==> rg sp zfs_12 StorDriver/ZfscreateOptions volblocksize=16k (but makes no sense)

This didn't work:
rg sp zfs_12 StorDriver/ZfscreateOptions '-a b' (linstor: error: unrecognized arguments: b')
rg sp zfs_12 StorDriver/ZfscreateOptions '-a\ b'
rg sp zfs_12 StorDriver/ZfscreateOptions -ab
rg sp zfs_12 StorDriver/ZfscreateOptions '-ab' (no error but it saves '-ab' but should save -ab