added grouped flash messages template

[silasjoisten]

Subject

I am targeting this branch, because this is a bc.

Closes #507

Changelog

• flash message bag > 1 take grouped messaged
• otherwise take the normal template

To do

• add bool flag to configuration to allow disableing
• Update the documentation
• Update Translations

Look & Feel

Before

After

Collapsed

Expanded

[OskarStark]

Are they collapsed by default?

[silasjoisten]

@OskarStark yea, there collapsed by default.

[OskarStark]

Before you could ready any of them, we should expand them by default IMO

WDYT @sonata-project/core ?

[kunicmarko20]

can we get a before picture?

[silasjoisten]

@OskarStark If we expand them by default, we wouldn't have a benefit of this. I mean if some one edits 20 entries in a list and we expand it by default i think its the same like currently. Maybe just a few pixel.

But we can find a middle way. so removing the headline. "ERFOLGREICH" and display just one message so like normal but with a more link which expands the area and show all of them. This may dont need a config option.

Like this:
Default collapsed

expanded

But this solution requires a bit of css. I did not see any css file in this bundle (except the vendors) how shall i solve this? I wouldn't like to do this inline or with a <style> tag... Any idea?

[OskarStark]

Thank you @silasjoisten 🎉

[kunicmarko20]

there is a todo section that no one saw.......................................................................................................... 😅

[OskarStark]

🙊 ups 😄

but I thought about it:
I merged this, because we expanded them by default and this is a design change which should be the default afterwards. We don't hide some messages, so do we really want another config option?

[silasjoisten]

Waaiiiit

This is not inside!!

[silasjoisten]

i just screenshoted something to ask you if this style is ok