user_groups: Rename "Unsubscribe" to "Remove" in members list.

This commit renames "Unsubscribe" button in group members list
to "Remove".

web/src/stream_edit_subscribers.js

@@ -33,6 +33,7 @@ function format_member_list_elem(person, user_can_remove_subscribers) {
         is_current_user: person.user_id === page_params.user_id,
         email: person.delivery_email,
         can_remove_subscribers: user_can_remove_subscribers,
+        for_user_group_members: false,
     });
 }
 

web/src/user_group_edit_members.js

@@ -50,6 +50,7 @@ function format_member_list_elem(person) {
         is_current_user: person.user_id === page_params.user_id,
         email: person.delivery_email,
         can_remove_subscribers: settings_data.can_edit_user_group(current_group_id),
+        for_user_group_members: true,
     });
 }
 

web/templates/stream_settings/stream_member_list_entry.hbs

@@ -13,7 +13,11 @@
         <div class="subscriber_list_remove">
             <form class="remove-subscriber-form">
                 <button type="submit" name="unsubscribe" class="remove-subscriber-button button small rounded btn-danger">
+                    {{#if for_user_group_members}}
+                    {{t 'Remove'}}
+                    {{else}}
                     {{t 'Unsubscribe' }}
+                    {{/if}}
                 </button>
             </form>
         </div>