Fix deactivating conflicts filter programmatically

It wasn't updating the selected item in the dropdown.

src/gui/html/js/filters.js

@@ -73,6 +73,8 @@
 
     this.conflictingPluginNames = [];
 
+    document.dispatchEvent(new CustomEvent('loot-filter-conflicts-deactivate'));
+
     return wasEnabled;
   }
 
@@ -113,4 +115,8 @@
       list.appendChild(item);
     });
   }
+
+  static onDeactivateConflictsFilter() {
+    document.getElementById('conflictsFilter').value = '';
+  }
 }));

src/gui/html/js/initialise.js

@@ -51,6 +51,7 @@
     document.getElementById('hideMessagelessPlugins').addEventListener('change', onSidebarFilterToggle);
     document.getElementById('contentFilter').addEventListener('change', onSidebarFilterToggle);
     document.getElementById('conflictsFilter').addEventListener('iron-select', onConflictsFilter);
+    document.addEventListener('loot-filter-conflicts-deactivate', Filters.onDeactivateConflictsFilter);
 
     /* Set up handlers for buttons. */
     document.getElementById('redatePluginsButton').addEventListener('click', onRedatePlugins);