Fixes #395:Disabled save-sequence button when no steps are added.

[Divy123]

Fixes #[Add issue number here.]

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[Divy123]

@jywarren please review.

[Paarmita]

@Divy123 Thanks for the PR :) It looks great.

[jywarren]

This looks great. Very nicely done! Thank you!

There are plenty of issues up for grabs in this project, we'd love more help! Great work!

[welcome]

Congrats on merging your first pull request! 🙌🎉⚡️
Your code will likely be published to https://sequencer.publiclab.org in the next few days.
In the meantime, can you tell us your Twitter handle so we can thank you properly?
Now that you've completed this, you can help someone else take their first step!
See: Public Lab's coding community!

[jywarren]

And thanks @Paarmita for the extra review! Are you mostly focusing on one project or another, or just looking out across all publiclab projects? So helpful!

[Paarmita]

@jywarren I'm looking out all the projects of the organization and specifically helping the students on making their PR.

[jywarren]

That is so wonderful. Thank you @Paarmita !!!