Add/change for v0.5.0

[Add] Possibility of icons per row in the ListView if an item has one.
[Add] Option for icons in the ListView.
[Add] Show larger icon for focused ListView-item.
[Add] Checkmark in settings GUI for AppData/ProgramData application data folders as search folders.
[Add] Creation of SQLite database with search items (all files with matching extenstions).
[Add] Option to keep 1 database.
[Change] Move settings file to 'Data' subfolder.
[Add] Option to start with saved database results.
[Add] Do not overwrite existing shortcuts when creating new ones.
[Add] 'Do next' options at dialog after creating shotcuts.
[Add] Menu entry to open 'personal folder' in Windows Explorer.
[Bug fix] Minor bug fixes.