New: Tooltips for remove actions

Co-Authored-By: Mark McDowall <markus101@users.noreply.github.com>

frontend/src/Components/Filter/CustomFilters/CustomFilter.js

@@ -89,6 +89,7 @@ class CustomFilter extends Component {
           />
 
           <SpinnerIconButton
+            title="Remove filter"
             name={icons.REMOVE}
             isSpinning={this.state.isDeleting}
             onPress={this.onRemovePress}