Merge Application/Controllers client components

[roll]

Overview

After #487 and #447, there is a really tiny layer of controllers differentiated by a data type (table/text/file) that is basically a few similar components with mostly duplicated contents (like Actions/Menu/etc). It would probably make a lot of sense to merge them in the Application component for simplicity and better DX (as now there is no need to handle 10+ data types).