Allow integer slider to support 64 bit ints

[aparajit-pratap]

Purpose

https://jira.autodesk.com/browse/DYN-1085

• Added IntegerSlider64Bit that derives from SliderBase<long> to support 64 bit integers
• Deserialize a CoreNodeModels.Input.IntegerSlider type from JSON as a CoreNodeModels.Input.IntegerSlider64Bit so that the new 64 bit slider node is instantiated
• Serialize 64 bit node back as CoreNodeModels.Input.IntegerSlider type so that new DYN's can be opened by older versions of Dynamo
• Deserialize 32 bit integer slider from old XML format as new 64 bit integer slider - This does not seem to be straightforward since in order to not break the API I needed to keep the legacy class, which is why I had to retain the legacy behaviour of xml-based 32 bit integer sliders (to be deserialized as 32 bit). Now only when you save the XML file (when saved as JSON) and reopened, will the slider behave as a 64 bit integer slider node, not before.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Reviewers

@DynamoDS/dynamo

[mjkkirschner]

@aparajit-pratap an interesting set of failures, including the ones your predicted.

[mjkkirschner]

can we use nameof?

I guess with c# 7 we should be doing:
https://stackoverflow.com/a/4478490

[aparajit-pratap]

@QiltongTang do you know how to change the description of the output port tooltip for a UI node? The only thing remaining in this PR is to change the output port type of the integer slider to report Int64. Int32 is obviously wrong in this case.

[QilongTang]

@aparajit-pratap I would try look at when outport model constructor got called when placing integer slider: https://github.com/DynamoDS/Dynamo/blob/master/src/DynamoCore/Graph/Nodes/PortModel.cs#L335

[QilongTang]

[aparajit-pratap]

Thanks @QilongTang!

[QilongTang]

@aparajit-pratap Seems there are regressions with this PR?

[aparajit-pratap]

@aparajit-pratap Seems there are regressions with this PR?

@QilongTang there are 2 regressions remaining. I addressed many of them yesterday. Will address the remaining ones today. In the meantime do you have any comments on the rest of the review?

[QilongTang]

Overall looks solid, just a few minor comments!