Power rename does not remeber settings and defaults are inconvenient

### Description of the new feature / enhancement

Power rename does not remember the last used settings like "Use regular extensions", "Search all repetitions" or apply to File name only between ussages.

It does not do so even if history for input strings is enabled.

### Scenario when this would be used?

Users might not like the default settings (and changing file extensions by default is dangerous) and users usually whant the application to behave in the same way always. So remembering user options between sessions would be great.

### Supporting information

_No response_

Start at the PowerRename entry point and trace how options such as regular extensions, repeated matches, and file-name-only mode are initialized and changed. Ensure those choices persist between uses, including across sessions, while preserving the requested safer defaults; verify each option after restarting the application.

Written by the indexing model from the issue text.