Fixed libs search path
Fixed application crash when closing a document, which has items with custom icons
Fixed cached image initialization
Fixed bug when custom icons didn't load due to pixmap initialization in non-GUI thread
Fixed bug when images in a note didn't load due to pixmap initialization in non-GUI thread
Fixed creating tag model item icon from non-GUI thread
Fixed focus problems for collapsed note's metadata panel
Added lazy initialization for cachedPixmap
Fixed bug when images from a note, that was not opened during session, were not saved correctly
Folder tree now preserves it's state (collapsed and expanded folders) when pinned folder was changed