mountTab: when beforeSave or afterValidated cancels the save started by "Save" in the unsaved changes question,
the form tab stays open with its changes; it used to close and lose them
UFileInput: the error about a too large file shows the maxFileSizeKb limit in the unit that fits it,
such as 20 MB for 20480 KB; before, it showed 20480 Mb in English and 20480 Кб in Ukrainian
jshint is now a development dependency, since it is bundled into dist/codemirror-all.min.js:
the outdated lodash and minimatch versions that it pins are no longer installed with the package
ubs_message_edit-fm: the "Clear" button of the validity period picker empties the period instead of an error;
the period is marked as required, and an empty period is highlighted
and named in the validation error dialog by its own caption instead of the captions of its two dates