Quote file name to table style in LFUN_TABULAR_STYLE_INSERT

This might fix the woes with table styles on windows, where the path
to the system directory has blanks IIRC (C:\Program Files\...)

(cherry picked from commit d42a300dfe)

src/Text.cpp

@@ -5628,7 +5628,8 @@ void Text::dispatch(Cursor & cur, FuncRequest & cmd)
 			break;
 		UndoGroupHelper ugh(cur.buffer());
 		cur.recordUndo();
-		FuncRequest cmd2(LFUN_FILE_INSERT, tabstyle.absFileName() + " ignorelang");
+		FuncRequest cmd2(LFUN_FILE_INSERT,
+				 quoteName(tabstyle.absFileName()) + " ignorelang");
 		lyx::dispatch(cmd2);
 		// go into table
 		cur.backwardPos();

status.24x

@@ -77,6 +77,8 @@ What's new
 - Fix spacing problems in previews with math macros under specific
   circumstances (bug 13120).
 
+- Fix tabular styles on systems with blanks in system directory path.
+
 
 * USER INTERFACE