Need option to prevent typing in values

[SnowCreative]

It would be very helpful to have an input option to force selection from the list, rather than letting people type in whatever they want, just like we now have "Force Selection to List" for Listboxes.

[Jako]

TimerangeTV uses the options of the Ext.form.TimeField and Ext.form.ComboBox, so forceSelection should be possible for both fields. But I currently don't have the time to build that in.

What has to be done:

• forceSelection has to be made configurable in the TV options
• the configuration has to be added to the TimeField configuration in timerangetv.templatevar.js
• testing and release a new version