Rename address:merge to address:purge, included merging file/echo subscriptions, updated web subscription cannot add echos to deleted ftns

resources/views/system/form-echoarea.blade.php

@@ -65,6 +65,19 @@
 						</div>
 					</div>
 
+					@if($errors->count())
+						<div class="row">
+							<span class="btn btn-sm btn-danger" role="alert" style="text-align: left;">
+								There were errors with the submission.
+								<ul>
+									@foreach ($errors->all() as $error)
+										<li>{{ $error }}</li>
+									@endforeach
+								</ul>
+							</span>
+						</div>
+					@endif
+
 					<div class="row">
 						<div class="col-12 d-none" id="echoarea-select"></div>
 					</div>