fix(dropdown): keep searchterm in menu search

Whenever a dropdown menu contains a separate search input to filter the menu items, the input value was removed when the field was blurred without selecting anything. This leaves the items filtered without a clue what to filter the next time the dropdown is opened again.

Author: lubber-de

src/definitions/modules/dropdown.js

@@ -1213,7 +1213,7 @@
                                 if (!itemActivated && !pageLostFocus) {
                                     if (settings.forceSelection) {
                                         module.forceSelection();
-                                    } else if (!settings.allowAdditions) {
+                                    } else if (!settings.allowAdditions && !settings.keepSearchTerm && !module.has.menuSearch()) {
                                         module.remove.searchTerm();
                                     }
                                     module.hide();