The test_0680 hangs on Linux if current dir is not ugeneui's install dir

The script to reproduce the hang. See comment in the script:

```

#!/bin/bash

dir=`pwd`
ugene=<ugene-bin-dir>
qt=<qt-root-dir>

export UGENE_GUI_TEST=1
export LD_LIBRARY_PATH=${ugene}:${qt}/lib
export CMAKE_PREFIX_PATH=${qt}
export CPLUS_INCLUDE_PATH=${qt}/include
export QT_PLUGIN_PATH=${qt}/plugins
export CPATH=${qt}/include

rm -f ${dir}/UGENE-x.list
touch ${dir}/UGENE-x.list
count=1
while [[ ${count} > 0 ]]; do
echo GUITest_regression_scenarios:test_0680 >> ${dir}/UGENE-x.list
echo GUITest_regression_scenarios:test_7154 >> ${dir}/UGENE-x.list
(( count -= 1 ))
done

################################################################

1. 1. 1. 1. the test_0680 hangs if the following line is commented ####
            cd ${ugene}
            ################################################################
            ${ugene}/ugeneuid \
            --ini-file=${dir}/UGENED-x.ini \
            --gui-test-suite=${dir}/UGENE-x.list \
            2>&1 | tee ${dir}/UGENE-x.log

echo
echo '====================='
cat ${dir}/UGENE-x.log | grep -i fail

```