When configuring server, error message affects "Next" button when it shouldn't

Summary: When trying to "Join a cluster now", if there is an error in the "Start a new cluster" section, then I can't click "Next".

Repro:
1. Install Couchbase server, go to Step 1 of 5 in Setup
2. Select "Start a new cluster".
3. Enter some RAM quota that is too high. For instance, if RAM available is 1998 MB, then enter a Data RAM Quote of 2056.
4. Note that the "Next" button cannot be click.
5. Now select "Join a cluster now"
6. Notice that the "Next" button still cannot be clicked.
7. Switch back to "Start a new cluster"
8. Change the RAM quota so that the error message goes away (e.g. enter a low Data RAM quota value)
9. Notice that the "Next" button can be clicked now.
10. Select "Join a cluster now"
11. "Next" can still be clicked.

Expected:
The values in "Start a new cluster" should have no effect on the "Next" button when "Join a cluster now" is selected.

Actual:
The "Next" button is controlled by "Start a new cluster" validation even if "Join a cluster now" is selected.

I attached an animated GIF of the behavior. I also attached a Fiddler trace just in case.