Add folder dropdown to VM Migrate.

[lfu]

Part of ManageIQ/manageiq#17519.

https://bugzilla.redhat.com/show_bug.cgi?id=1090957

@miq-bot add_label gaprindashvili/no, enhancement

[miq-bot]

Checked commit lfu@8d7818b with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 1 offense detected

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• 💣 💥 🔥 🚒 - Linter/Haml - Linter::Haml STDERR:

warning: parser/current is loading parser/ruby23, which recognizes
warning: 2.3.6-compliant syntax, but you are running 2.3.3.
warning: please see https://github.com/whitequark/parser#compatibility-with-ruby-mri.

[mzazrivec]

@lfu Please remove the pending core label one the core pull request is merged. Thanks.

[gmcculloug]

@h-kataria Related PR is merged. Please review.

[gmcculloug]

@dclarizio Since @h-kataria is away can someone else review?