Configurable branding via init file

[glughi]

What this PR does

Added the ability to set brandBarElements, brandBarSmallElements and displayOneBrand in the init files. This way, using the init file in the URL you will be able to see brand elements other than the default ones.

Test me

Add

"parameters":{
        "brandBarElements": [
            "<a target=\"_blank\" href=\"https://www.bioretics.com\"><img src=\"https://www.bioretics.com/themes/bioretics/assets/images/Bioretics-logo.svg\" alt=\"Bioretics\"  height=\"52\" title=\"Bioretics\" /></a>"
        ]
    }

to an init file.

Checklist

• There are unit tests to verify my changes are correct or unit tests aren't applicable (if so, write quick reason why unit tests don't exist)
• I've updated relevant documentation in doc/.
• I've updated CHANGES.md with what I changed.
• I've provided instructions in the PR description on how to test this PR.

[zoran995]

Hi, @glughi, I am not sure we want to support this in the open-source, as it opens the door to presenting the maps with different branding and might give the wrong impression about who owns the map (and the map owner might actually spend a lot of time crafting the catalogue)

[glughi]

Hi @zoran995, we could add a parameter in the config to enable/disable this feature. At that point, if the admin then allows it, it is his responsibility.

[glughi]

We would also have prepared the change of main theming colours (such as "colorPrimary", "colorSecondary", "dark", etc.) using init files.