Fluid: restructuring and rejuvenation of the source code.

* Add classes for application and project
* Removed all globals from Fluid.h
* Extracting args and project history into their own classes
* Moving globals into Application class
* Initialize values inside headers for some classes.
* Undo functionality wrapped in a class inside Project.
* File reader and writer are now linked to a project.
* Avoid global project access
* Nodes (former Types) will be managed by a new Tree class.
* Removed static members (hidden globals) form Node/Fl_Type.
* Adding Tree iterator.
* Use nullptr instead of 0, NULL, or 0L
* Renamed Fl_..._Type to ..._Node, FL_OVERRIDE -> override
* Renaming ..._type to ...::prototype
* Splitting Widget Panel into multiple files.
* Moved callback code into widget panel file.
* Cleaning up Fluid_Image -> Image_asset
* Moving Fd_Snap_Action into new namespace fld::app::Snap_Action etc.
* Moved mergeback into proj folder.
* `enum ID` is now `enum class Type`.

1 files changed, 3 insertions, 3 deletions

diff --git a/fluid/panels/about_panel.fl b/fluid/panels/about_panel.fl
index 3b5d54b72..7e7feba5f 100644
--- a/fluid/panels/about_panel.fl
+++ b/fluid/panels/about_panel.fl
@@ -20,10 +20,10 @@ comment {//
 } {in_source in_header
 }
 
-decl {\#include <time.h>} {public global
+decl {\#include "Fluid.h"} {public global
 }
 
-decl {void show_help(const char *name);} {public local
+decl {\#include <time.h>} {public global
 }
 
 Function {make_about_panel()} {open
@@ -60,7 +60,7 @@ Version x.x.x}
     }
     Fl_Button {} {
       label {View License...}
-      callback {show_help("license.html");}
+      callback {Fluid.show_help("license.html");}
       xywh {115 145 123 25} labelcolor 136
     }
     Fl_Return_Button {} {