feat(stark-ui): table - Add support to show rows counter

[SuperITMan]

ISSUES CLOSED: #1244

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NationalBankBelgium/stark/blob/master/CONTRIBUTING.md#-commit-message-guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[X] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

There is no rows counter available in the table component.
It was the case in the previous implementation of Stark.

Issue Number: #1244

What is the new behavior?

Provide optional rows counter in the table component.

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

@christophercr I hesitate about the number to show...
Here, I display {{ data.length }}, as it was the case in the previous implementation, but we could display {{ dataSource.data.length }} which represents the displayed rows (in case of filtering).

What do you think we should use ?

(I have the feeling we should display {{ dataSource.data.length }})

[christophercr]

Some remarks. There are also a couple of layout issues:

1.- when the showRowsCounter is used together with customTableActionsType="alt":

2.- when the showRowsCounter is used in a table with transcluded action bar:

[christophercr]

About the number to show, I also think we should show the number of displayed rows. In fact, we are already taking that into account to update the total pages in the pagination...

[coveralls]

Coverage increased (+0.008%) to 92.821% when pulling bdad94f on SuperITMan:feature/table-add-total-items into 629455d on NationalBankBelgium:master.

[SuperITMan]

@cnomes @christophercr I updated my PR. Could you please have a look ? 😊

[christophercr]

One small remark.

Another thing although not related to this PR. Could you adapt the example of the "Table with fixed header" to pass a pagination config with itemsPerPage: 10? Otherwise the table is too small so the scroll bars are not shown which makes the "fixed header" feature not to be showcased :(

[christophercr]

In my opinion this line-height could be lower, maybe 22px?

Cause right now with 35px it looks a bit weird in small screens:

[SuperITMan]

Yep', it's OK for me. I took the value we had before.

[SuperITMan]

@christophercr PR updated 😊