FileManager: Fix shortcuts

Fix shortcuts behavior when FileManager is already open.

Repro:
1) Open FileManager
2) Create shortcut for folder
3) Navigate to another folder (not including new folder)
4) Switch to homescreen (launcher)
5) Select the shortcut created in step 2

Expected behavior:
Navigate to shortcut folder

Observed behavior:
FileManager shows last navigated directory (before going to launcher)

Change-Id: I1db814a8990073f8d2de88f90b23b51a1e77cf8e
Ticket: QRDL-1034