table js: simplify access to records taking advantage of new structure where record id became the same as ngram_id (see commit 39b176f9 compared to file before refactoring)

Conflicts:
	gargantext/views/api/urls.py

[FIX] Add search icon. TODO: implement search and remove links towards commercial searchs (science is agnostic many thanks for your comprehension.)

[FIX] Database capacity detected for Text Indexing. 2 paths for next steps: hash indexing and text (postgresql) indexing.