Update PreviewView to listen for library search queries

[LoayGhreeb]

• Update PreviewView to listen for library search queries instead of the StateManager property.
• Follow-up to Add tooltip for cell content and entries' preview in Main Table #11176. The preview was updating in the background when hovering over entries, even when shouldShowPreviewEntryTableTooltip was disabled.
• The highlighting was not working when searching before opening the entry editor.

Mandatory checks

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked 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 to the documentation repository.

[koppor]

Just a small comment

[koppor]

This can be moved to the if block

Please swap the conditions - typically, one should have the positive case first. Alternatively, "fail fast". Keep the negative thing, but then do "return this;" and then without else do the rest.

The indent of line 37 "this.setGraphic" is off

[LoayGhreeb]

This can be moved to the if block

In both cases it should be updated, as it is also used in the tooltipContent line 27.

[koppor]

Oh, wow, something which is not directly seeable while browsing through the github diff 😅

[koppor]

Can we also remove the activeSearchQuery completely from the state manager?

[LoayGhreeb]

It is still used by GlobalSearchBar because there is only one bar shared between the open libraries.

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