Reset and Import for SidePanePreferences

[Shreyasdone]

Closes #14407

Mandatory checks

• I own the copyright of the code submitted and I license it under the MIT license
• [/] I manually tested my changes in running JabRef (always required)
• [/] I added JUnit tests for changes (if applicable)
• [/] I added screenshots in the PR description (if change is visible to the user)
• [/] I described the change in CHANGELOG.md in a way that is understandable for the average user (if change is visible to the user)
• I checked the user documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request updating file(s) in https://github.com/JabRef/user-documentation/tree/main/en.

[calixtus]

This is not correctly adapted:

[Shreyasdone]

private SidePanePreferences() {
    this(
            EnumSet.of(SidePaneType.WEB_SEARCH, SidePaneType.GROUPS), // Default visible panes (OPEN_OFFICE omitted)
            Collections.emptyMap(),                                  // Default preferred positions
            0                                                       // Default web search fetcher index
    );
}

Hi @calixtus , is this the approach that you're looking for?

[calixtus]

.

[Shreyasdone]

Hi @calixtus, can you please check if the snippet I've added in the comments of the review is the one you want?