[TASK] file_list: use t3-table & semantic HTML in localization

Brings the central table mark-up and style definition "t3-table"
to file_list backend module. Thanks to the unification few lines
of duplicated css definitions can be tossed.

Also moves the localization icons into the html table row. This
is a semantic clean-up and gives every file entry one table row.
-> Buttons can be added to title cell since cell is always visible.

Note: RequireJS module is moved to EXT: file_list.

By hiding the flag icons from within html right away there
is no flashing between render & ready (JS hide()).

Change-Id: Ic84450b8327c9533037ea21054799d6ad9d8d74b
Resolves: #55810
Releases: 6.2
Reviewed-on: https://review.typo3.org/27512
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn