About the PR:
* We use "blocked" as an abstract term, when there may be different reasons
* If there is a concrete reason, we use a more concrete word like "unstable"
or "not useful"
* Double negations like "don't block" or "block unstable" are avoided
Besides this, this PR
* Lets `Lv2Manager` hide the full `std::set` of plugin URIs
* Fixes occurences of "BuffersizeLessThan32" - it is less or equal
* Moves `enableBlockedPlugins` from Engine to `ConfigManager`
This PR places all LMMS symbols into namespaces to eliminate any potential future name collisions between LMMS and third-party modules.
Also, this PR changes back `LmmsCore` to `Engine`, reverting c519921306 .
Co-authored-by: allejok96 <allejok96@gmail.com>
This also adds more min/max checks, mostly for logarithmic scales.
Since this raised some warnings for logarithmic CV ports, the CV
metadata is now also read (but CV ports are still not supported).
