Fix shader's step hint range for integers

Reduce descriptor sets in cubemap filter

Add more missing icons (and adjust a few)

Properly handle EOF when parsing text resource

Fixes #36652

Removed ResourceInteractiveLoader, add built-in threaded loading.

Signals: Port connect calls to use callable_mp

Those were problematic as they call a method of their parent class,
but callable_mp does not allow that unless it's public.

To solve it, we declare a local class that calls the parent class'
method, which now needs to be protected to be accessible in the
derived class.

It's tedious work...

Some can't be ported as they depend on private or protected methods
of different classes, which is not supported by callable_mp (even if
it's a class inherited by the current one).

Remove now unnecessary bindings of signal callbacks in the public API.
There might be some false positives that need rebinding if they were
meant to be public.

No regular expressions were harmed in the making of this commit.
(Nah, just kidding.)

Add unique icon to Polygon2D

Fix shadowed variable build error

Fix import changing disabling checking on multiple files

Clicking backgrd. dimming of editor popup stops input event propagation

Mention the `duration` parameter unit in `UPNP.add_port_mapping()`

Rename Navigation{Mesh,Polygon}Instance and PlaneShape for clarity

Basic fast filtering implementation

Improve the RegEx class documentation

doc: Mention concatenation using the `+` operator in Array

Add a practical example for `@GDScript.linear2db()`

Improve the `@GDScript.inverse_lerp()` documentation

Improve documentation related to fixed physics processing

Properly free many Vulkan resources

Reimplement `Mutex` with C++'s `<mutex>` (plus more)

A click on the dimmed background of a popup in the editor should stop the input event from propagating to the background.

This solution reuses the system introduced in commit efc3ffb8, taking advantage of the hide() notifications from the modal where we will set the flag "pass_on_modal_close_click(false)" to stop event handling at the viewport input event handling.
The viewport first hides the modal and after marks the input as handled if the flag mentioned above is set.

Fixes #36341

This closes https://github.com/godotengine/godot-docs/issues/2452.

This closes https://github.com/godotengine/godot-docs/issues/2522.