[VSCode extension] Typing dot autocompletes in unintuitive ways

### Apache NetBeans version

Apache NetBeans 16

### What happened

Consider the following code:

```java
class Bar {

static void bar() {
class Foo { static void foo() {} }
// cursor here
}
}
```

Now type `Foo`. At this point NetBeans provides suggestions:


Then type a dot. Now NetBeans autocompletes `Foo.` to `ForLoopTree.` and gives suggestions for it.

What I expected to happen, is for NetBeans to just add the dot, and give suggestions for the class `Foo` defined in the line above:


In other words: when what's before the dot is valid in the current context, typing a dot should never (unless there's sensible exceptions I'm missing) autocomplete. When I want to autocomplete to a type, I can easily press Tab or Enter to autocomplete first, and then type the dot.

### How to reproduce

As described in `What happened`.

### Did this work correctly in an earlier version?

No / Don't know

### Operating System

Windows 11

### JDK

openjdk full version "20-ea+22-1594"

### Apache NetBeans packaging

Apache VSNetBeans for VSCode

### Anything else

_No response_

### Are you willing to submit a pull request?

Yes

### Code of Conduct

Yes

Reproduce the completion behavior in Apache NetBeans 16 using the Java snippet and the Apache VSNetBeans for VSCode packaging. Start by tracing the Java completion path that handles typing a dot after Foo; done means the dot is inserted without replacing a valid Foo reference and suggestions remain scoped to Foo.

Written by the indexing model from the issue text.