Frederic Massart 3aed37ee4d MDL-48269 group: Remove the option to hide the picture of a group
Plus additional amendments to Fred's original commit:
1. Updating the version numbers
2. Merging the original two-step upgrade below into one for simplicity:
   1. Deleting the pictures for groups with hidepicture set to 1; and
   2. Dropping the hidepicture field itself.
3. Converted array() usages to the short syntax [].
2021-02-16 12:46:58 +08:00
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