Fix syntax highlighter init (#1866)

Author: vkbo

novelwriter/gui/doceditor.py

@@ -301,8 +301,6 @@ def updateSyntaxColours(self) -> None:
         self.docHeader.matchColours()
         self.docFooter.matchColours()
 
-        self._qDocument.syntaxHighlighter.initHighlighter()
-
         return
 
     def initEditor(self) -> None:
@@ -336,6 +334,9 @@ def initEditor(self) -> None:
         font.setPointSize(CONFIG.textSize)
         self._qDocument.setDefaultFont(font)
 
+        # Update highlighter settings
+        self._qDocument.syntaxHighlighter.initHighlighter()
+
         # Set default text margins
         # Due to cursor visibility, a part of the margin must be
         # allocated to the document itself. See issue #1112.