Plugin PyQt5 and PyQt6 compatible & CenRa_Copie bug fix

CenRa_PAGERENDER/CenRa_PageRender.py

@@ -32,7 +32,10 @@ from .tools.resources import (
 from .canvas_editor import PageRender_Editor
 from .about_form import AboutDialog
 
-from PyQt5.QtCore import *
+try:
+    from PyQt5.QtCore import *
+except:
+    from PyQt6.QtCore import *
 
 class PgPageRender:
     def __init__(self):
@@ -115,7 +118,7 @@ class PgPageRender:
         About dialog
         """
         dialog = AboutDialog(iface)
-        dialog.exec_()
+        dialog.exec()
     def open_help():
         """ Open the online help. """
         QDesktopServices.openUrl(QUrl('https://plateformesig.cenra-outils.org/'))