Dialog boxes may have infinite/very large width

[Rangi42]

Maximized window, single monitor:

[Rangi42]

Might be fixed as of 3.2.0:

[Rangi42]

This code in Modal_Dialog::refresh may be responsible:

	int bwd = (_icon_type == Icon::NO_ICON ? 0 : 60) + 20;
	fl_font(_heading->labelfont(), _heading->labelsize());
	int hw = _max_w - bwd, hh = 0;
	fl_measure(_heading->label(), hw, hh);
	fl_font(_body->labelfont(), _body->labelsize());
	int bw = _max_w - bwd, bh = 0;
	fl_measure(_body->label(), bw, bh);
	int w = MAX(MAX(bw, hw) + bwd + OS_FONT_SIZE, _min_w), h = 10;

fl_measure may be returning very high values.