DlgPrefsTechDrawGeneral.ui: get rid of explicit font family
DlgPrefsTechDrawGeneral.ui: get rid of explicit font family

this is unnecessary since Qt will automatically use the available font. It only raises questions since one see in the commit diffs that depending on who modified the dialog, his system default font will appear. (like in the initial commit of this PR)

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master