Extend class Templates also for PoolDictionaries and Traits

[astares]

From a discord chat on Calypso:

Torsten(astares):

I've seen that there is a check box to switch between the slot and non-slot class template. Nice addition.

Can we have another checkbox so we can enable "PoolDictionaries" switching from

Object subclass: #NameOfSubclass
instanceVariableNames: ''
classVariableNames: ''
package: 'Foo'

to

Object subclass: #NameOfSubclass
instanceVariableNames: ''
classVariableNames: ''
poolDictionaries: ''
package: 'Foo'

Denis Kudriashov:

Hi. Good idea. I also wanted to add traits checkbox there

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So it would be good to have possibly a combo box where different templates
could get selected (classes, class with slots, class without slots, Trait, Stateful trait, ...