fix(import) update the style (refs #4137)

update CSS
remove core CSS
minor HTML and JS improvments
fix(IHM) correct import IHM

Add autodeploy of asynchronous import with synchronous limit is
reached
Add search input to the result/preview dataTable
Refactor external frame code to set in in editimport frame
Correct html
Merge pull request #1032 from cbonnissent/updateMainImport

fix(import) update the style (fixes #4137)