ICSHWI-12071 - General FE modification

Jira Ticket: https://jira.esss.lu.se/browse/ICSHWI-12071

General FE modification to make FE apps look more alike by update to theme, styles and a like.

• Add "ENVIRONMENT_TITLE" to title in header (nav top bar) and browser tab title.
• Change "RootPaper" sizing to remove scrollbar
• Add divider to LHM
• Update pre-commit eslint & prettier hooks