jpgd: Upgrade to upstream 2.00, fuzzed with zzuf and afl

mbedtls: Update to upstream version 2.16.6

Fixes https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04

DocData: Keep Mono properties on non-Mono builds

Exposed RenderingDevice to script API

Also added an easier way to load native GLSL shaders.

Extras:

Had to fix no-cache for subresources in resource loader, it was not properly working, making shaders not properly reload.

Note:

The precommit hooks are broken because they don't seem to support enums from one class being used in another.
Feel free to fix this after merging this PR.

Add editor freelook navigation scheme settings

Fix square image resize

Document how to workaround UI anchor issues when using BackBufferCopy

Check for errors when saving in the ResourceSaver example documentation

Improve the VisibilityEnabler and VisibilityNotifier documentations

Correct typo mistake of profiler_add_frame_data argument in physics 3d server

Fix more GCC -Wmaybe-uninitialized warnings

Use proper depth buffer format for rgba shadows

Fixes #38005.

Fix handling of PROPERTY_USAGE_SUBGROUP in DocData and editor

This doesn't make much sense API-wise, but it's important for the documentation
workflow that the Mono and non-Mono builds produce the same output, otherwise
we keep having non-Mono builds removing Mono properties and losing their
descriptions.

This is a terrible hack but it's ad hoc, and should be OK for the time being.

Subgroups were added in #37678 but not properly handled everywhere
where PROPERTY_USAGE_GROUP is.

DocData: Skip unexposed classes

doc: Sync classref with current source

Revert "Made possible to specify where to dump the contents when load…

Properly expose classes that we actually want accessible.

Add missing enum bindings.

Update many docs with recent rendering changes

Update TextEdit docs - explaining 'override_selected_font_color' role

This reverts commit 3c261e0d.

This was not so useful as is due to the way dependency paths are stored
in scenes and resources.

Correct Dictionary addition of a key and the duplication of a variable name.

in Dictionary class documentation.

Ability to create local RenderingDevice instances.

Mono: Fix include for Android support

This was a typo in #37153.
Co-authored-by: Ignacio Etcheverry <ignalfonsore@gmail.com>

Depending on what one is trying to achieve, a different freelook mode
may be more desirable.

This closes #34034.

Fixes #37980

This closes #6880.

This also replaces a non-breaking space that was accidentally added in
the EditorFeatureProfile documentation.

This closes #31393.