[erp5_officejs] Add a generic HTML5 application launcher

This top gadget can be reused by any HTML5 application who want the same layout.
The configuration is done on the Web Site level with the 'WebSection_viewHateoasPreference' configuration form.

bt5/erp5_officejs/bt/template_keep_last_workflow_history_only_path_list

 web_page_module/gadget_officejs_**
 web_page_module/gadget_ckeditor_**
 web_site_module/officejs_text_editor
-web_site_module/officejs_text_editor/**
\ No newline at end of file
+web_site_module/officejs_text_editor/**
+web_page_module/officejs_launcher_**
\ No newline at end of file

bt5/erp5_officejs/bt/template_keep_workflow_path_list

 web_page_module/gadget_officejs_**
 web_page_module/gadget_ckeditor_**
 web_site_module/officejs_text_editor
-web_site_module/officejs_text_editor/**
\ No newline at end of file
+web_site_module/officejs_text_editor/**
+web_page_module/officejs_launcher_**
\ No newline at end of file

bt5/erp5_officejs/bt/template_path_list

 web_page_module/gadget_ckeditor_**
 web_page_module/gadget_officejs_**
+web_page_module/officejs_launcher_**
 web_site_module/officejs_text_editor
 web_site_module/officejs_text_editor/**
\ No newline at end of file