Add ability to reverse the sort order in explorer

[lioman]

• add option to settings
• adapt interfaces
• reverse sort order in FileSorter if option is set

This PR fixes #149951

[ghost]

All CLA requirements met.

[lioman]

Any news on that @lramos15 - can I help to push this through?

[lioman]

This pr ist now some time Open. IT would really help, if one could reverse the order.

Is something still blocking a merge?

[lramos15]

Not sure we want to add a third sort option, maybe this could go under explorer.sortOrder. Also we get a lot of sort option requests in general so not sure if we will be taking this in or investigating ways for extensions to provide sort orders to help cover everyone's needs.

[lioman]

@lramos15 I think it is a bit different here. This wan is not a third option, but one to reverse any set order. I think about this as clicking on the order columns in an email client. Sometimes you need the oldest one first, sometimes the other way round. Currently, vscode has only an option to ORDER BY but you can't switch between ASC and DESC

[lramos15]

Yes but I wonder if we should just do Sort order as one option and then Sort order - reverse as the other. Basically doubling the list instead of having a third option, I'm not sure. The downside being that will grow the list quite a bit.

[lioman]

That doesn't sound better to me. For two reasons: List is doubled in size and more important, every change needs to be maintained in two entries.
So if there is a new option, the reverse one must always be added too.

[lramos15]

Yeah that makes sense. I still wish there was an easy way for extensions to contribute sort order since we get a lot of sort asks in general and cannot maintain them all.

[id-ekaagr]

Please bring your attention here, for some dev this is a must have feature and this "reverse sort order in explorer" is not even a big ask.

[lioman]

This would be really valuable and a small change. Is there anything I can do to support this change @lramos15

[lramos15]

Thanks for the contribution @lioman. And thanks for being patient. I was trying to debate better ways to do this as it opens the door to 100 other sort feature requests that we will have to maintain, but I understand the want for a simple reverse and don't want to continue to hold this feature back.