Allow selecting installed apps or browsing custom EXEs when adding to the excluded apps list

### Description of the new feature / enhancement

Allows selecting installed apps or exes instead of typing the exe name (eg olk.exe)

### Scenario when this would be used?

When you want to just select an app instead of typing the exe name

### Supporting information

Most users only know the app name (eg Task Manager) instead of the exe name (eg Taskmgr.exe)

The issue names no files, tests, or utility entry point. Start by locating the UI for the excluded apps list and its current executable-name input; compare the requested installed-app selection and custom EXE browsing flows. Done means users can select an installed app or browse to an EXE without manually entering its name, with tests covering both paths.

Written by the indexing model from the issue text.