Fix crash #1671 gdraw/gresedit.c

`GResEditDlg()` has sections to set up the different kinds of controls as found in various panes in the X resources dialog.  In two panes clicking on the 'inherit' checkbox for the "Font:" item would crash FF ("Text" and "Button" panes).

`GRE_InheritFontChange()` runs to react to those user clicks.  It calls `GRE_FigureInheritance()` to figure out the inheritance issues (whether to inherit from the parent `GGadget` type).

A parameter to `GRE_FigureInheritance()` 'is_font' is used to flag that a more complicated font data item is being manipulated. That flag was not set on this call, even though a font item *was* being manipulated, which then caused a crash in a deeper call to `inherit_font_change()`.

Tested and cures crash.  Inheritance appears to work correctly...

During investigation, noted that descriptive title in the "Progress" pane was wrong.  Changed this to "Progress Bars".