LPS-44264 Hook to support RTL feature in 6.2.x (3rd part - Bug fix backport)

Hey Brian,

This is the third and last set of commits for the RTL hook. Here we apply the solution all RTL bugs reported in master to the plugin. In most cases it's a one-to-one replication of the solution for master. We had to override the ComboServlet to apply one of the bug-fixes.

Thanks