Correct bug on sources in advanced search and more

Closes #3, #57, #58, #92, #39, #4

More:

• added validation toasts on user search history add and delete
• added user search history description display
• added user search history delete logic (with confirmation modal)
• added clear (reset all values to empty) button
• corrected bug that prevented advanced search data to be persitant between search tabs
• corrected bug that prevented advanced search field 'add value' button to be seen while selecting from a strict list