Filter field for the diff view in the commit dialog

### Description

Hello,

I would find it useful if there would be a filter field in the diff view in the commit dialog.
Maybe next to the arrows. The filter field I would like to filter e.g. for "*java" so that e.g. files ending in ".form" are excluded.

### Use case/motivation

_No response_

### Related issues

_No response_

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

No

Start by locating the NetBeans commit dialog and its diff view, including the controls near the navigation arrows. Clarify how patterns such as “*java” should filter displayed files, then verify that the dialog exposes the filter and the diff view updates to match it.

Written by the indexing model from the issue text.