Navgator

+ Column positioning can now be saved and restored
+ Checkbox selections works even if Name column isn't first
* Name column can't be hidden
+ Row height is adjusted based on Thumbnails column visibility

* Improvements to thumbnail generation
+ Context menu for Columns allowing to show/hide columns
+ Columns can be moved around
+ Visible columns is saved and restored

++ Thumbnails are visible for image files in last column.
Row heights has been increased to accomodate it. To be improved.
! Model stopped getting refreshed on background changes. Fixed.

! Free space wasn't displayed on Del Dir Up. Fixed.
+ Back and Forward tooltips show the destination.
! Selection stats were incorrect at times. Attempted fix.
! Last item couldn't be dragged. Fixed.
! New tabs didn't activate pane change unless restarted. Fixed.
! Navigating back to root would display root twice. Fixed.
!! Breadcrumbs memory leak. Fixed.
+ Added Toolbar icon to go up
+ Toolbar buttons are disabled if can't go back/forward/up

+ Pane status show available free space on mount point
!! Files deleted from Navgator weren't removed from listing. Fixed.
!! Failed to launch if active tab was pointing to non-existing directory. Fixed.
! Selection stats were incorrect on certain conditions. Fixed.

+ ContextMenu for BreadCrumbs.
+ New Command: Copy Path (Ctrl+Shift+P) available in BC Bar ContextMenu
+ New Commands: Paste and Go (Ctrl+Shift+G) available in BC Bar ContextMenu