#3708 - Concept feature editor layout broken

- Fix the layout so the width of the feature editor adjusts properly

inception/inception-ui-kb/src/main/java/de/tudarmstadt/ukp/inception/ui/kb/feature/ConceptFeatureEditor.html

@@ -33,7 +33,7 @@
             <i class="fas fa-external-link-alt"></i>
           </a>
         </div>
-        <input style="width: 1%;" wicket:id="value" type="text"/>
+        <input class="flex-content" wicket:id="value" type="text"/>
       </div>
       <div wicket:id="descriptionContainer" class="scrolling border border-top-0 rounded-bottom p-1" style="max-height: 4.5rem; word-wrap: break-word;" readonly>
         <small class="text-muted" wicket:id="description"/>