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/group-plans/taskInformation.vue

@@ -57,7 +57,7 @@
       b-dropdown(:right="true", :variant="'success'")
         div(slot="button-content")
           .svg-icon.positive(v-html="icons.positive")
-          | {{ $t('create') }}
+          | {{ $t('addTaskToGroupPlan') }}
         b-dropdown-item(v-for="type in columns", :key="type", @click="createTask(type)")
           span.dropdown-icon-item(v-once)
             span.svg-icon.inline(v-html="icons[type]")