libobs: Fix bad source release placement

(This commit also modifies the UI)

The source release was being done in the wrong file.

UI/window-basic-main.cpp

@@ -6149,8 +6149,9 @@ void OBSBasic::on_actionCopyFilters_triggered()
 void OBSBasic::on_actionPasteFilters_triggered()
 {
 	OBSSource source = obs_get_source_by_name(copyFiltersString);
-	OBSSceneItem sceneItem = GetCurrentSceneItem();
+	obs_source_release(source);
 
+	OBSSceneItem sceneItem = GetCurrentSceneItem();
 	OBSSource dstSource = obs_sceneitem_get_source(sceneItem);
 
 	if (source == dstSource)

libobs/obs-source.c

@@ -430,8 +430,6 @@ void obs_source_copy_filters(obs_source_t *dst, obs_source_t *src)
 	duplicate_filters(dst, src, dst->context.private ?
 					OBS_SCENE_DUP_PRIVATE_COPY :
 					OBS_SCENE_DUP_COPY);
-
-	obs_source_release(src);
 }
 
 obs_source_t *obs_source_duplicate(obs_source_t *source,