Is your feature request related to a problem? Please describe.
When performing a find by selection, the Author, Subject, Category, and Tax Year need to be cleared individually at times when a value has been previously selected, and new values need to be selected. PDFKeeper had this button prior to version 9.0.0 when the find/search functionality was on the main form.

Describe the solution you'd like
Add a Clear Selections button to the dialog that will be enabled when Find by Selections is chosen. The button. when selected will clear the selected Author, Subject, Category, and Tax Year.

Additional context