Clarify email confirmation checkbox instructions

Improves UX and reduces confusion when updating a user's
email confirmation status.

- Moved confirmation status inline with the "Email status:" heading
- Updated checkbox helper text to reflect current @user.confirmed? state:
  - Shows "(Check to confirm email)" if unconfirmed
  - Shows "(Uncheck to unconfirm email)" if confirmed

Author: aaronskiba

app/views/super_admin/users/_email_confirmation_status.html.erb

@@ -1,11 +1,12 @@
 <div class="form-group col-xs-12">
-    <%= f.label(:confirmed_at, _('Email Confirmation Status'), class: 'control-label') %>
+    <%= f.label(:confirmed_at, _('Email status: '), class: 'control-label') %>
+    <%= @user.confirmed? ? _("Confirmed.") : _("Unconfirmed.") %>
     <br>
     <% is_checkbox_disabled = @user.can_super_admin? && @user.confirmed_at.present? %>
     <%= f.check_box(:confirmed_at, { checked: @user.confirmed?,
                                      disabled: is_checkbox_disabled,             
                                      style: 'vertical-align: middle;
                                              margin-top: -2px;' }) %>
-    <%= @user.confirmed? ? _("Confirmed.") : _("Unconfirmed.") %>
-    <%= content_tag(:small, _("(Use checkbox to change status.)")) unless is_checkbox_disabled %>
+    <% checkbox_helper_text = @user.confirmed? ? _('(Uncheck to unconfirm email)') : _('(Check to confirm email)') %>
+    <%= content_tag(:small, checkbox_helper_text) unless is_checkbox_disabled %>
 </div>