BS-8180 : [Regression] After migration with custom look'n feel, forms are not well displayed

- Add a new warning before run the migration
BS-7295 : [PERF] : 2 new indexes - Load Tests - 20000 instances - Case 00012456

- Create migration for the fix of the bug
report fix on check job work test
BS-7563 : [6.1.2] [PERF] 4 new indexes

- create migration for the 3 new indexes
BS-8338, add bonita home and theme 6.2.6
merge master into BS-7150_UserMetadata6_3