Only display tips of features that are available on the open VS version

[prnadago]

In tip metadata - what is the earliest version that this tip's feature is available for users
In display logic - detect VS instance version and don't display tip if it's min version is higher than current version.

Reason: Some tips are of the latest features that users should be made aware of, but they won't be able to use that feature until the upgrade.

Alternate option: Show all tips but also display min version so that a user will know to update VS if they want to use that feature.

[justcla]

This could be added as another option for Dynamic Tips. Ie. Tips based on VS version.

But in the meantime, it sounds sensible to include the VS version number in the metadata as an optional attribute. We can decide what to do with it later. (ie. Do we show it? Or just use it to filter out?)