GTF parsing errors for GTF from UCSC with additional whitespace characters

See the attached "chr1-10000-lines.gtf" file. This data were downloaded from UCSC and should be considered as valid. However, UGENE outputs a lot of messages into the log like:

[TRACE] GTF parsing error: invalid attributes format at line 9950!

And an error message:

[ERROR]GTF parsing error: one or more errors occurred while parsing the input file, see TRACE log for details!

It seems the problem is additional space characters in a line. Fix the issue in a similar way as UGENE-6406, i.e. open the file without errors, however write the following INFO message:

The 'file_name' file GTF format is not strict — there are unexpected whitespace characters in some lines.