Added functionality for selecting multiple running items

[Axle7XStriker]

Previously, Jupyter Notebook didn't had options for selecting multiple running items just like it has in the files tab where multiple items can be selected and operations can be performed on them. This functionality was also desired in the running tab which is resolved by this commit.

Since kernelList and terminalList inherits from the notebookList class there is option for including the functionality for selecting multiple items by passing true as one of the parameter when creating the list items. Although some other modifications had to be done to make it look similar to the files tab in the tree.html file and accordingly configure other parameters in the kernellist.js, main.js, notebooklist.js and terminallist.js.

closes #970

[kevin-bates]

@Axle7XStriker - I'm sorry this has gone dormant. Since there's been some revived interest in this and it seems like a generally useful feature, would you mind resolving the current conflicts and we'll see if we can't get this kick-started?

We'll need to ask some of the front-end maintainers to review this following the rebase.

[Axle7XStriker]

Sure, I'll have it rebased as soon as I can.

[kevin-bates]

Fantastic - thank you!

@jasongrout - I'm sorry to always turn to you for front-end guidance but can you, or someone you know is familiar with this area, please review Aman's PR?

[Axle7XStriker]

I'm done with the rebase and have fixed some of the issues that were present, but I'm not able to understand why some of the tests are failing.

[kevin-bates]

I wouldn't worry about that test failure as all of the more recent PRs are failing in the same way. Someone from the front-end needs to look into what's going on and, hopefully, also review your PR.

I'm not sure how testing works on the front-end but I see your PR doesn't appear to include any tests. That might be something the reviewer would like to see prior to its review.

[RAJSINGH-Bitian]

i would like to work with you. @Axle7XStriker will you pleasee let me in.

[jtpio]

Thanks @Axle7XStriker for working on this and for your time 👍

This repository has undergone major changes to the code base in the past few months, and is now set to target the next major release (7.0) of the Jupyter Notebook application.

As mentioned in #970 (comment), this is now fixed on the latest main. This can also be tested with a pre-release: python -m pip install --pre notebook.

Closing as completed, thanks again!