First steps of new vtkRecreateConfigurationForm.

Nothing interesting.
Corrected bug in vtkProjects.

xmlRememberedProjectsFullPath Get property was private whereas it should
be public.
Userform continued.

- The path of the remembered projects sheet now changes its color if the sheet
does not exist or is not valid.
Added things in vtkNewRecreateConfigurationForm

- constants for colors
- now the 2 fields "root folder" and "xml relative path" appear on the form
- these two fields are filled according to combobox content
- added dummy project in VBAToolKitProjects.xml for testing purposes
Added configuration support in the form.

- added error handlers
- added reset of "configuration" fields by the "Select Project" combobox
- added set of "configuration" of configuration fields by the "Select Configuration" combobox
Added check of the existence of the template.
"Create Configuration" button working.

- "Create Configuration" button is now enabled only if no template is needed or
if the needed template is present
Fixed bug in vtkRecreateConfiguration

- When references already present in a template are trying to be reactivated,
do not pay attention to the error.
Added color orange in the form.

- Green path : everything's fine
- Red path : file/folder can't be found
- Orange path : file can't be read