[UI][Outgoing links][Backlinks] Remove redundant file path from the file title display

Use case or problem

Currently, in Backlinks or Outgoinglinks in left sidebar, when a file link is displayed, the first row shows the full path including the filename (e.g., folder1/folder2/folder3/File-Title). However, the second row already explicitly displays the directory path (folder1/folder2/folder3).

See screenshorts below.

Proposed solution

The first row should only display the filename (e.g., File-Title), since the context (path) is already provided in the subtitle.

Current workaround (optional)

Related feature requests (optional)