Add project in QGIS browser

[jmkerloch]

I suggest we add support to add all layer and groups from a project to the QGIS browser.

I will have one entry for each project and subfolders with groups and layer.

This should look like this:

A PR is on the way.

This ticket is created to discuss this new functionnality.

[jmkerloch]

For better readability of PR I suggest we do this in several steps:

• always add project in QGIS browser (no option for project)
• refactor code for multiple layer add to be able to support Add all option in browser
• add option in project to define if it should be enable in browser

[jmkerloch]

We also need to discuss how we will implement merge option for QGIS browser.

[jmkerloch]

For Add all option we can't use an item in explorer because it won't be last since item are always sorted alphabetically.

I suggest we use a menu with an action.

[xcaeag]

Yes, I was wondering what you were going to propose. A context menu for layer groups? It's a shame to lose the order defined in the project.

And you won't need to add the ‘separator’ elements starting with ‘-’ either.