Install Wizard mentions Zowe version 2 during Zowe v3 installation

[skurnevich]

Install Wizard doesn't seem to work well with Zowe v3 pax files. Some screens still seem to detect it as v2.

It seems that some pages are mention Zowe v2 even if you upload Zowe v3 pax file.
Could be happening after unsuccessful attempt to install Zowe via downloading latest pax which takes Zowe v2 and fails ( #268 )

[1000TurquoisePogs]

Let's try this again - v3.1 just came out, does it grab 3.1 now?

[1000TurquoisePogs]

@struga0258 saw that this is due to hardcoding of "v2.x" in this file such as here

zen/src/actions/PlanningActions.ts

Line 113 in 546038f

https.get('https://raw.githubusercontent.com/zowe/zowe-install-packaging/v2.x/master/manifest.json.template', (res) => {

I would say this should instead be reactive.

The user either uploads the version they want, or chooses to get "the latest"
I suppose "the latest" could just mean v3, but it would be better if "download the latest" was actually 2 buttons: download v2 or download v3.

When the user chooses upload instead, you could just check the filename to detect which version it is.

Anyway, this file should be adjusting which branch it is pulling depending on if it sees v2 or v3.