Merge remote-tracking branch 'origin/v8/8.4' into v8/8.5

bump version to 8.4.1

Make Nested Content actually save the item content again (umbraco#7301)

Added "rc" to AssemblyInformationalVersion

Removing the MiniProfiler routes if solution is not in debug mode.

Removing the MiniProfiler routes if solution is not in debug mode.

Removing the MiniProfiler routes if solution is not in debug mode.

Removing the MiniProfiler routes if solution is not in debug mode.

updating syntax.

Removing the MiniProfiler routes if solution is not in debug mode.