Remove default value from DOM

[Crash--]

We now have a new method to init and inject the cozy-stack variables in the app's dom. We use cozy-data={{}} instead of cozy-data-X={}. By doing so, we can break the bar if the app doesn't pass all the value during the initialization phase of the bar.

I think we should remove the fact that the Bar can init itself from the DOM. The APP should be responsible to do that.

We should remove https://github.com/cozy/cozy-bar/blob/master/src/dom.js#L4 for instance.

cozy-bar/src/index.jsx

Line 151 in 35e4bcd

appNamePrefix = getAppNamePrefix(),

we should not set default value.

(see cozy/cozy-drive#2395)