Improve Kustomize 2 parameters UI

[alexmt]

Is your feature request related to a problem? Please describe.

The Parameters tab of Kustomize 2 apps should be as usable as Kustomize 1. With kustomize 1 UI user can quickly see the images and have simple UI to change image tags. With Kustomize 2 user seeing nothing in view mode, unless images are overridden. In edit mode UI only provides text input to override image.

Describe the solution you'd like
The view mode should be similar to Kustomize 1. Edit mode should allow using Kustomize 2 features ( e.g. set new name )

[alexec]

I'm not sure about this. It brings a LOT of logic into the UI. It was an explicit decision to dumbly pass the images to kustomize, to keep the code simple while making sure no power was abstracted away.

I don't feel strongly about this, but I'm am worried a more complex UI creates more work for ourselves.

[alexmt]

Apparently there is not so much logic, just two functions: parse and format: https://github.com/argoproj/argo-cd-ui/pull/125/files#diff-15133e3112f57e4790c0b0773d329c66R14

The rest of changes are UI related. I think it worth support it because it really increases usabilty of UI for kustomize apps.

[alexmt]

Implemented

[alexec]

I've added milestone.