new client various fixes: all users now see challenge progress, changes to create strings, etc (#9078)

* 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

website/client/components/groups/myGuilds.vue

@@ -17,7 +17,7 @@
       .col-4
         button.btn.btn-secondary.create-group-button.float-right(@click='createGroup()')
           .svg-icon.positive-icon(v-html="icons.positiveIcon")
-          span(v-once) {{$t('create')}}
+          span(v-once) {{$t('createGuild2')}}
         // @TODO: Add when we implement recent activity .float-right
           span.dropdown-label {{ $t('sortBy') }}
           b-dropdown(:text="$t('sort')", right=true)