Add a "Details" Link to the warning notification

[derjohn]

Hello Kibana Devs,
I had some painful fun in finding the cause for "Courier Fetch: X of Y shards failed". I am aware that kibana only hands over what's in the response from ES. At the end I had to use the webdeveloper toolbar to see that the (ajax) request to elasticsearch

"..../elasticsearch/_msearchtimeout=0&ignore_unavailable=true&preference=..."

contains useful information about the cause for the shards fetch failure:

{"responses":[{"took":237,"timed_out":false,"_shards":{"total":345,"successful":330,"failed":15,"failures":
....... nested: SearchParseException[[indexname-2015.05.21][10]: from[-1],size[-1]: Parse Failure [Failed to parse source .....  nested: ElasticsearchParseException[failed to parse date field [somedata], tried both date format [dateOptionalTime], and timestamp number]; nested: IllegalArgumentException[Invalid format: ....

I propose to have a "Details" Button on the Yellow Warning bar on top of the page that contains a popup with the errormessage in full text. Mabe the behavior could be configurable for those who don't to confuse their users.

rgds,
derjohn

[timroes]

Our notification system has been replaced by EUI's new toast notifications, and thus I will close this in favor of the new EUI issue: elastic/eui#393