BAP-3961: Left side navigation bar

  - refactored structure of header and main-menu styles
  - redeveloped concept of left and right panels
  - decorated sided main-menu
  - added icons for first level menu items
Merge branch 'master' into ticket/BAP-3961
Merge branch 'master' into ticket/BAP-3961
Merge branch 'master' into ticket/BAP-3961
BAP-3961: Left side navigation bar

 - fixed selenium tests
Merge remote-tracking branch 'origin/master' into ticket/BAP-3961
BAP-4259: introduce blocks for placeholders
Merge pull request #677 from laboro/feature/BAP-4259-notes-placeholder-blocks

BAP-4259: placeholder blocks
Merge branch 'master' into feature/BAP-4259-notes
CRM-1223: Create OroCRMCase Bundle
- add bundle
CRM-1224: Create Case entity
-add entity
CRM-1224: Create Case entity
- copy workflow from task
CRM-1224: Create Case entity
CRM-1224: Create Case entity
CRM-1224: Create Case entity
CRM-1252: Add REST API
- wip API and test
CRM-1224: Create Case entity
Merge branch 'feature/CRM-1192_cases' of github.com:laboro/crm into feature/CRM-1192_cases
BAP-4259: rollback placeholder blocks
Merge pull request #683 from laboro/feature/BAP-4259-rollback-placeholder-blocks

BAP-4259: rollback placeholder blocks