[Feature Request]: Update field in all transforms upon renaming

[gmitter-ef]

What would you like to happen?

When you decide to rename a field, even when renaming it in the transform that generates it / puts it into the stream, the subsequent transforms that use it still reference it with the old name, which makes the pipeline fail.
It would be extremely practical to be able to rename stream-fields and automatically update their usages in the subsequent transforms.

Example: select-values-basic.hpl in samples/transforms, open "Test Data", rename "id" to "id1" ==> the pipeline fails with
"Rename, reorder fields.0 - ERROR: Couldn't find field 'id' in row!"

Issue Priority

Priority: 3

Issue Component

Component: Pipelines, Component: Hop Gui

[gmitter-ef]

Annoying are also the missing updates when changing/renaming transforms that go into a "Merge join" transform, or renaming the transforms that come after a "Switch case".