The lines 797-802 in src/QtellaSub.cpp looks like this:

#ifndef USEKDE
#ifndef SHARP
ui_checkbox_fileassociations->hide();
ui_checkbox_systemtray->hide();
#endif
#endif

I commented out the ui_checkbox lines:

#ifndef USEKDE
#ifndef SHARP
// ui_checkbox_fileassociations->hide();
// ui_checkbox_systemtray->hide();
#endif
#endif

And I managed to compile and install qtella.