Upstream 1.5.31 + R3 changes 5

Includes the previous R3 changes.
Upgraded Dokka to 1.5.31.

Upstream 1.5.0 + R3 changes 4

Includes the previous R3 changes and removes the 'final' keyword from properties.
Also, update javadoc jquery version to 3.6.0.

Upstream 1.5.0 + R3 changes 3

Includes the previous R3 changes plus a number of changes to fix issues found during full review of Conclave docsite.
Updated to snapshot of 1.5.0.

Upstream 1.4.32 + R3 changes 2

Includes the previous R3 changes plus a fix to the javadoc class template that prevented IDEs from recognising the javadoc format.

Upstream 1.4.32 + R3 changes

r3-1.4.32

Downgrade kotlinx_html_version to 0.7.2 because the latest version is…