Description of problem:
String value entered in write attribute dialog is written to command without double quotes, which is wrong in many cases

Eg. when user enteres in dialog value ${jboss.bind.address:127.0.0.1}
following command is generated:

/subsystem=webservices/:write-attribute(name=wsdl-host,value=${jboss.bind.address:127.0.0.1})

Correctly should be generated command 
/subsystem=webservices/:write-attribute(name=wsdl-host,value="${jboss.bind.address:127.0.0.1}")

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. start AS
  ./bin/standalone.sh
2. start CLI GUI 
  ./bin/jboss-cli.sh --gui &
3. click on node subsystem=webservices of /
4. right click on wsdl-host and select write-attribute
5. enter value ${jboss.bind.address:127.0.0.1} and click OK
6. submit generated command
7. reload node
  click on node subsystem=webservices of / (close node)
  click on node subsystem=webservices of / (open node)

Actual results:
  wsdl-host=$

Expected results:
  wsdl-host=${jboss.bind.address:127.0.0.1}


Workaround
  in dialog box enclose the value in double quotes

Additional info: