* riece-unread.el

* riece-unread.el
(riece-unread-format-identity-for-channel-list-indicator): Escape
% -> %%; use riece-propertize-modeline-string.

* riece-history.el
(riece-history-format-identity-for-channel-list-indicator): Escape
% -> %%; use riece-propertize-modeline-string.

* riece-highlight.el
(riece-highlight-format-identity-for-channel-list-indicator):
Escape % -> %%; use riece-propertize-modeline-string.

* riece-display.el
(riece-format-identity-for-channel-list-indicator): Escape % ->
%%.
(riece-update-channel-list-indicator): Rewrite.

* riece-emacs.el (riece-propertize-modeline-string): New function.
* riece-xemacs.el (riece-propertize-modeline-string): New function.