rem: WMSetRulerMargins(WMRuler *rPtr, WMRulerMargins margins)
add: void WMSetRulerMargins(WMRuler * rPtr, WMRulerMargins margins)
context: WMSetRulerMargins(WMRuler *rPtr, WMRulerMargins margins){    if(!rPtr)        return;    rPtr->margins.left = margins.left + rPtr->offset;    rPtr->margins.right = margins.right + rPtr->offset;    rPtr->margins.first = margins.first + rPtr->offset;    rPtr->margins.body = margins.body + rPtr->offset;    rPtr->margins.tabs = margins.tabs; /*for loop*/    paintRuler(rPtr);}