Fix missing completion items for fully qualified name completion

[jdneo]

• Filter text must be align with the replaced range which is defined in the text edit.

fix redhat-developer/vscode-java#3173

[testforstephen]

fqn_completion.mp4

The usual qualified name completion works well. But it still doesn't work for the case new java.util.Arr|, which doesn't complete the (). If it's not related with this PR, free free to merge this PR first and open a new PR to fix it.

[rgrunber]

I've also seen the behaviour described above where selecting a constructor doesn't include the empty round brackets. It seems to work other times though.

[jdneo]

I'll take a look

[jdneo]

But it still doesn't work for the case new java.util.Arr|

The root cause is that we should always update the filter text according to the range of the text edit. Previously, we only update it when the completion proposal kind is TYPE_REF. This should be a bug already exists before. See the change: 00ecd16

But I have no idea why on my side, the completion list does not contain the type completion for ArrayList, I only have the constructor. I've already rebase the PR and reload the target platform. Strange 🤔

[rgrunber]

If this is safe for inclusion in the 1.26.0 release, feel free to merge.