[WIP] Remove dead miqSetButtons & miqButtonOnWhen

[himdel]

Since the toolbar refactor, miqSetButtons doesn't really do anything because the onwhen functionality is handled differently in the toolbar code (via Rx rowSelect).

Removing, thus making miqButtonOnWhen superfluous too.

WIP for now - because we either want to remove this, or change the toolbar to support a setCount action, which may be more robust than the current isClicked ? this.countSelected++ : this.countSelected--; (here, via) and use that instead.

Cc @martinpovolny, @karelhala

[miq-bot]

Checked commit https://github.com/himdel/manageiq/commit/d2252dae8c4706b1dd83327943b3f8c8900f0cfd with ruby 2.2.5, rubocop 0.37.2, and haml-lint 0.16.1
4 files checked, 0 offenses detected
Everything looks good. 🏆

[himdel]

note to self: #11815 is introducing the "set toolbar count" part of this already..

[himdel]

another note to self: found the expected count bug...

go to http://localhost:3000/ems_infra/10000000000036?display=ems_clusters&vat=true
check 2 clusters, toolbar compare .. and then push the back button
those clusters are still checked, but the toolbar thinks 0, and uncheck/recheck goes to -2 and back to 0

[himdel]

Adding a setCount in ManageIQ/ui-components#33 - v0.0.8

[martinpovolny]

watch out for: #11952

I consider @h-kataria 's patch a temporary one and we should get rid of miqSetButtons

possibly handle the RHN buttons in a different way (convert it to angular?)

[miq-bot]

<pr_mergeability_checker />This pull request is not mergeable. Please rebase and repush.

[chessbyte]

Please re-create PR in https://github.com/ManageIQ/manageiq-ui-classic