DT-457: Add ability to select all stories in a project

[torresga]

Jira Ticket

See https://ombulabs.atlassian.net/browse/DT-457

Motivation / Context

In a Points project, stories need to be selected individually. There is no option to select all. There should be a Select All option to be able to easily perform bulk actions.

QA / Testing Instructions

1. Go to a project with stories
2. Check the Select All checkbox
3. Ensure that all stories are selected and Bulk Delete button becomes enabled and shows the number of all stories selected
4. Unselect the Select All checkbox
5. Ensure that no stories are selected and the Bulk Delete button is disabled

Screenshots:

Note:

• app/models/user.rb was changed here because there were some linting issues standardrb wouldn’t let me commit without.
• I also realize the CI for this is failing - I did add a PR for this change in another PR DT-459: Updates upload-artifact #332 and then cherry-picked the change in this PR to ensure CI passed.

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