Gwenhywfar

FOX16_GUI: Make dialog class public.

GUI: Fixed a bug in GWEN_Dialog_EmitSignalToAll2().

Only report that a signal has been handled if any dialog reported it!
Otherwise the e.g. key events are ignored by widgets which leads to them
not being able to handle keypress and keyrelease events properly.

FOX16_GUI: Removed "FOX16_Gui*" from dialog.

This will allow using this class outside the initial use case within GWEN.

FOX16_GUI: Also emit "ValueChanged" for listboxes.

IPC: Started working on IPC module.

GUI: Add dialog property GWEN_DialogProperty_WindowId.

This is a special property for X11 environments only, it returns the
X11 window handle id (not to be used in normal apps, but e.g. needed when
embedding a libvlc media player).

Implemented this property in FOX16 gui.

GUI: Fixed missing return value.

GUI: Implement "GWEN_WIDGET_FLAGS_FRAME_*" flags for FOX16 frontend.

GUI: Read widget flags "GWEN_WIDGET_FLAGS_FRAME_*".

GUI: Added second dialog callback to allow for 2 arguments.

This is needed to convey keypress/keyrelease events. If a handler for the
new callback mechanism is set it will be used, otherwise the old type1
handler will be called and the arguments ignored....

Build: Changed order of libs.

Follow "gwenhywfar-5.7.4-typemaker2-Makefiles.patch"
from gnucash-on-windows.

fix out-of-tree build

Released 5.7.4.

Released 5.7.4.

Prepared release 5.7.4.

Typemaker2: Fixed a bug.

Typemaker2: Fixed *_copy() function.

Increased build version.

Fixed a typo.

Added test for environment variable.

Minor code simplifications.

CSV: Cleanup, allow for subfields.

The CSV importer can now also handle subfields and parse them accordingly.
This is usefull if a CSV field contains more structured data.

In such a case the column spec in the configuratin file must contain a
DB_Group instead of a variable like in this example:...

Removed unneeded file.

Moved to "c" folder and split into multiple files.

Merge branch 'mp-202110-typemaker2_cleanup'

typemaker2: Some ideas for future iterations...