[bisq-network/bisq] Fix offer editing for low volume offers (#2929)

[a123b]

A user on the forum had problems editing an offer:
https://bisq.community/t/alt-buy-offer-not-editable/7930

For very low volume offers, it can happen that the minimum buyer security
deposit by coin value is bigger than the maximum security deposit by
percentage of trade amount.
This caused the security deposit validity check in the offer editor to fail,
making it impossible to edit these offers.
This PR fixes the problem by setting the default percentage value to
the model instead of the calculated one in this specific case.
You can view, comment on, or merge this pull request online at:

  https://github.com/bisq-network/bisq/pull/2929

-- Commit Summary --

  * Fix offer editing for low volume offers

-- File Changes --

    M desktop/src/main/java/bisq/desktop/main/portfolio/editoffer/EditOfferDataModel.java (12)

-- Patch Links --

https://github.com/bisq-network/bisq/pull/2929.patch
https://github.com/bisq-network/bisq/pull/2929.diff

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