Add more extensions to the dummy texture loader

Mono/C#: Fix assemblies being reloaded a second time unnecesarily

C#: Revert marshalling of IDictionary/IEnumerable implementing types

Fix Android templates size regression

The issue was caused by PR #36906 which changes prevented the generated shared libraries from being stripped.
Since the change is only needed for development (debugging) purposes, it's commented out by default.

Added marshalling for `System.Collections.Generic.List<T>` and
`System.Collections.Generic.Dictionary<TKey, TValue>`.

Mono/C#: Allow exporting System.Array of type Godot.Object

Fix missing DEFVAL for RenderingDevice.index_buffer_create

C#: Save copy of sln and csproj before applying fixes

Mono/C#: Allow debugging exported games

- Include PDB files in exported games.
- Release export templates also allow debugging now.

Right now the only way to enable debugging in exported games is with the  environment variables, which may be cumbersome or not even possible on some platforms.

Revert "Allow parameters passed to GDScript functions to be nulled"

Emit signal when animation ends by seek

Fixed output prints " Signal 'node_removed' is already connected "

Fixed output prints " Signal 'node_removed' is already connected " when the editor settings window is closed.

Close #38012

GDScript: Fix type inference for const reference to global class

Fix unassigned variable warnings for match bindings

Update Joint gizmos automatically

Register the DisplayServer Singleton

Fix compilation of jpgd.cpp on MSVC 2017

Fix "Local" button not being pressed in the Scene dock on first run

Add proper type to most public API uses of Array

GDScript class name existance check enhanced

Line marked unsafe when base known and index unkonwn

Autocompleting with indexing for builtin types added

Add ability to bind typed arrays to script API

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