[Console] make InputArgument::setDefault() chainable
minor #9269 [Console] make InputArgument::setDefault() chainable (pscheit)

This PR was merged into the master branch.

Discussion
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[Console] make InputArgument::setDefault() chainable

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | maybe
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT

To allow chaining of methods, setDefault should return the InputArgument. I'm not quite sure if you would tread this as a BC break?

best regards
Philipp

Commits
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7b7a4c1 [Console] make InputArgument::setDefault() chainable
fixed CS