migrate the old useemoticons option to emoticons_theme. Fixes #1715

src/common/optparser.py

@@ -207,4 +207,7 @@ class OptionsParser:
 		if self.old_values.has_key('autodetect_browser_mailer') and \
 			self.old_values['autodetect_browser_mailer'] is True:
 			gajim.config.set('autodetect_browser_mailer', False)
+		if self.old_values.has_key('useemoticons') and \
+			not self.old_values['useemoticons']
+			gajim.config.set('emoticons_theme', '')