Issue 13: Readonly Tokenfield still can remove token causing ReadOnlyException
Status:  New
Owner: ----
Reported by wahnscha...@gmail.com, Sep 17, 2013
<code>
TokenField tokenField = new TokenField();
tokenField.setStyleName(TokenField.STYLE_TOKENFIELD);
tokenField.setFilteringMode(FilteringMode.CONTAINS);
tokenField.setNewTokensAllowed(false);
tokenField.setReadOnly(true);
</code>

Caused by: com.vaadin.data.Property$ReadOnlyException
	at com.vaadin.ui.AbstractField.setValue(AbstractField.java:465)
	at com.vaadin.ui.AbstractField.setValue(AbstractField.java:445)
	at org.vaadin.tokenfield.TokenField.removeToken(TokenField.java:581)
	at org.vaadin.tokenfield.TokenField.onTokenClick(TokenField.java:495)
	at org.vaadin.tokenfield.TokenField$4.buttonClick(TokenField.java:517)