Dropdown enter is for searching, arrows and mouse are for navigating.

web/model-manager.js

@@ -991,6 +991,8 @@ class DirectoryDropdown {
                 else if (e.key === "Enter") {
                     e.stopPropagation();
                     const input = e.target
+                    /*
+                    // enter is for search
                     const selection = options[iSelection];
                     if (selection !== undefined && selection !== null) {
                         DirectoryDropdown.selectionToInput(
@@ -1005,6 +1007,7 @@ class DirectoryDropdown {
                         }
                         updateCallback();
                     }
+                    */
                     await submitCallback();
                     input.blur();
                 }