Add message horizontal align property to search results module
Add message horizontal align property to search results module

In addition to exposing the vertical alignment of the message
label, we need to expose its horizontal alignment.

This allows us to e.g. center the message label without
centering the entire module itself.

[endlessm/eos-sdk#3625]

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib