Move "I should see Crowd login form" feature to a view spec

We were doing all kinds of code gymnastics to "enable" Crowd in the
feature spec and this would sometimes cause a transient failure.

Really what it's testing is if the Crowd login form shows when Crowd's
enabled, so this is much better suited to a view spec.

See merge request !2963

Reformats confusing '[named here]' section for 3rd party code attribution

Weird formatting originally. Which of the following is the proper format for attribution?

1. Submitted on behalf of a third-party: [David Alexander]
1. Submitted on behalf of a third-party: [[] David Alexander]
1. Submitted on behalf of a third-party: [] David Alexander
1. Submitted on behalf of a third-party: [[ David Alexander ]]
1. ... _etc._

With this change, it allows for either of the following formats:

1. Submitted on behalf of a third-party: [David Alexander]
1. Submitted on behalf of a third-party: David Alexander

See merge request !2861

Add instructions for pushing tags as well as branches

Current instructions will push the svn branches but not tags  - add missing line to tags


See merge request !2778

Does not create a Todo when commenting on commit or project snippet

Closes #13733

See merge request !2964

Fix order in Gemfile.lock

See merge request !2969

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