Allow filters to be deleted even if protected

[sebjulliand]

Changes

Fixes #2251
The logic for deleting Object Browser items would prevent filters from being deleted if they were protected.

This PR makes filter item deletable, not mater what.

How to test this PR

1. Try to delete a protected filter
2. The confirmation dialog must show up
3. If confirmed, the filter must be removed

Checklist

• have tested my change

[worksofliam]

Works as expected. Maybe there is some overlap between this and #2250?

[sebjulliand]

Works as expected. Maybe there is some overlap between this and #2250?

A little bit...I guess the command in #2250 should simply be:

vscode.commands.registerCommand(`code-for-ibmi.objectBrowser.removeFilter`, (node:  ObjectBrowserItem, nodes:  ObjectBrowserItem[]) => vscode.commands.executeCommand(`code-for-ibmi.objectBrowser.delete`, node, nodes));