Linebreak/Textwrap in p:messages - primefaces

Question

I have a p:messages Element in a Dialog. When the Message added by a Validator in this Element is too long, the Dialog gets wider, but stays in the same Position, which looks weird. Is there a way to get the Message to fit the dialog instead of the dialog changing size to fit the message?
The xhtml:
<p:dialog header="Benutzer erstellen / verwalten" id="userManageDialog"
widgetVar="userManageDialog"
modal="true"
showEffect="fade" hideEffect="fade" resizable="false">
<p:outputPanel id="userData" rendered="#{not empty userDetailController.user}">
<!-- this is needed to be able to display validation messages from controller -->
<p:messages id="messages" closable="true">
<p:autoUpdate/>
</p:messages>
<div class="ui-fluid p-grid">
<div class="p-field p-col-12 p-md-12">
<p:outputLabel id="passwordLabel" for="password" value="Passwort: "/>
<p:password id="password" value="#{userDetailController.user.password}"
disabled="#{not userDetailController.newUser}" redisplay="true"
required="true"
requiredMessage="Bitte geben Sie ein Passwort ein."/>
</div>
</div>
</p:outputPanel>
</p:dialog>
The Validator:
public boolean isValid(String password) {
boolean valid = true;
if(StringUtils.isEmpty(password)) {
validationMsgs.add("Passwort ist leer!");
valid = false;
}
Matcher m = p.matcher(password);
if(!m.matches()) {
validationMsgs.add("Das Passwort muss zwischen 6 und 20 Zeichen lang sein und mindestens einen Buchstaben und eine Zahl enthalten!");
valid = false;
}
return valid;
}