This should result in some noticeable performance improvements,
aside from fixing bugs due to conflicts in logic.
This also simplifies some related code identified while debugging.
Previously, an EditorInspector's property name can only be set from
outside. Inspectors used for settings needs to respond to changes in
editor settings. So a few boilerplate code is almost always needed,
including watching for a certain editor setting in `_notification()`.
This commit adds a `set_use_settings_style()` function to tell the
inspector to watch for editor settings changes on its own.
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.
It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).
We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).
Also fixed "cf." Frenchism - it's meant as "refer to / see".
`EditorInspector::update_tree` is expensive, so defer the call to the process phase
to prevent multiple calls in a single frame (when switching scene tabs).
In `EditorProperty::update_revert_and_pin_status`, if `checkable` is `true`, update `checked` based on the variant type of the value, and rename the function as `EditorProperty::update_editor_property_status`.
**Known problems:**
1. Unable to check Checkbox for properties of type `Object` when it is unchecked. This is probably because during value store/fetch, the `nullptr` (variant type is `Variant::OBJECT`) eventually becomes `Variant()` (variant type is `Variant::NIL`).
2. For theme overrides, click the revert icon will uncheck the Checkbox. This is probably because `EditorPropertyRevert::get_property_revert_value` returns `Variant()`.
