Signed-off-by: NGustavo Sampaio <gbritosampaio@gmail.com>

Signed-off-by: NGustavo Sampaio <gbritosampaio@gmail.com>

use shared CSS-style element instead of repeated inline styles, only access dom when having contents, #84726

Fixes #84185

The `MutableDisposable` class represents a disposable value that can be changed. The class automatically disposeds of the old value when a new one is set, which can prevent a common programming mistake. `MutableDisposable` is useful in places we are currently using `private property?: IDisposable`.

This change uses a `MutableDisposable` to manage the code lens model.

This reverts commit 869e5921.

Either extend `Disposable` or use a readonly `DispoableStore`

Readonly helps with type guards and code comprehension

We compile using the alwaysStrict flag so these directives are not needed