Fix #9732: Inconsistent font properties for the preview and superscript insets

(cherry picked from commit b6f8a84a359d717a5d87f58a3403b3c6b64440e3)

src/insets/InsetPreview.h

@@ -45,6 +45,8 @@ public:
 
 	bool neverIndent() const { return true; }
 
+	bool inheritFont() const { return false; }
+
 	InsetCode lyxCode() const { return PREVIEW_CODE; }
 
 	docstring layoutName() const { return from_ascii("Preview"); }

src/insets/InsetScript.h

@@ -82,6 +82,8 @@ public:
 	///
 	bool neverIndent() const { return true; }
 	///
+	bool inheritFont() const { return false; }
+	///
 	int plaintext(odocstringstream & ods, OutputParams const & op,
 	              size_t max_length = INT_MAX) const;
 	///

status.22x

@@ -227,6 +227,8 @@ What's new
 
 - Fix display of some text-mode accents in the citation preview (bug 9340).
 
+- Fix font display in preview insets (bug 9732).
+
 
 * INTERNALS