start the File Open dialog in the CWD
start the File Open dialog in the CWD

When the user wants to open a file, HeeksCAD starts browsing the dir of
the most recently opened file.  This commit makes it so that if there
are no recent files, HeeksCAD starts browsing in the current working
directory.
Nurb432/heekscad,thojongle/heekscad,FluffyMortain/heekscad,FluffyMortain/heekscad,singwina/heekscad,DINKIN/heekscad,pyrotron/heekscad,singwina/heekscad,tectronics/heekscad,namoamitof/heekscad,pyrotron/heekscad,ahmetsemihparlak/heekscad,AlanZheng/heekscad,DINKIN/heekscad,thojongle/heekscad,namoamitof/heekscad,Powerino73/heekscad,Nurb432/heekscad,Nurb432/heekscad,ahmetsemihparlak/heekscad,tbinias/heekscad,ahmetsemihparlak/heekscad,tbinias/heekscad,namoamitof/heekscad,Powerino73/heekscad,namoamitof/heekscad,FluffyMortain/heekscad,FluffyMortain/heekscad,AlanZheng/heekscad,tbinias/heekscad,pyrotron/heekscad,AlanZheng/heekscad,thojongle/heekscad,tectronics/heekscad,thojongle/heekscad,tectronics/heekscad,DINKIN/heekscad,singwina/heekscad,DINKIN/heekscad,ahmetsemihparlak/heekscad,Powerino73/heekscad,singwina/heekscad,tectronics/heekscad,pyrotron/heekscad,Powerino73/heekscad,Nurb432/heekscad,AlanZheng/heekscad,tbinias/heekscad