Refactor NewEntry: extract Dialogs from VernWithSug

[imnasnainaec]

All the logic for handling NewEntry Dialogs was being unnecessarily complicated by passing into VernWithSuggestions.

Resolves #675

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This change is 

[jasonleenaylor]

I wonder if we will regret the move refactor to NewEntry. Will that make it harder to handle edits in the Review Entries tool in a similar way?

Reviewed 8 of 8 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)

[imnasnainaec]

@jasonleenaylor What sort of similar edits might we have in Review Entries?

Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)

[imnasnainaec]

Reviewed 8 of 8 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved

[imnasnainaec]

I think this is closer to having a dialog layer outside the input-with-suggestions, which we would want if we were to use it elsewhere.

Reviewable status: complete! all files reviewed, all discussions resolved

[jasonleenaylor]

Reviewable status: complete! all files reviewed, all discussions resolved