EqualizerPresetSelector: Allow user to ajust the custom profiles order

This merge request brings some adjustments to the equalizer with:

• The custom equalizer profiles created by the user that can now be reordered in the list by selecting one of their leading actions.
• The rename and delete actions are that now added as trailing actions in order to be able to add a proper icon instead of a label and therefore match the implementation of the leading actions previously mentioned.
• Everything related to the custom equalizer profiles is now located in a proper dedicated file.

Leading actions

Trailing actions

(Feature request mentioned here: https://code.videolan.org/videolan/ios-support/-/issues/56873)

Sources/Network/Server List/VLCServerListViewController.m

@@ -586,9 +586,11 @@
 
 - (void)discoveryFoundSomethingNew
 {
-    [_localNetworkTableView reloadData];
-    [_localNetworkTableView layoutIfNeeded];
-    _localNetworkHeight.constant = _localNetworkTableView.contentSize.height;
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [_localNetworkTableView reloadData];
+        [self->_localNetworkTableView layoutIfNeeded];
+        self->_localNetworkHeight.constant = self->_localNetworkTableView.contentSize.height;
+    });
 }
 
 -(void)showEmptyMediaListAlert