* adjust how User > Profile is referred to
* change "Create" to "Add Task" in a Challenge's page
* remove commented-out code for making a Group Plan cost Gems (there should be no Gem cost)
* split 'create' locales string into multiple strings for different purposes
- Allows text to be changed individually for each purpose.
- Assists translators in determining the best translation.
- Makes it easier to find locations in code for each string.
* remove "public" option for Group Plan creation modal
* allow all users to see challenge participant progress
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