[WIP] work on menu bundle upgrade

                   
|Q            |A  |
|---          |---|
|Bug Fix?     |n  |
|New Feature? |n  |
|BC Breaks?   |n  |
|Deprecations?|n  |
|Tests Pass?  |n  |
|Fixed Tickets|   |
|License      |MIT|
|Doc PR       |   |
                   


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it seems psr-2 does not say anything about string concatenation but i tend to always have a space before and after. not sure what would be the right thing - but we should be consistent.