Feature: Add one-click option to add symlinks for all build tiles

[shred86]

I'm a big fan of the option to Ctrl-click on the map to automatically create a symlink to the "Tiles" folder (or wherever you store your Tiles). However, if you ever update Ortho4XP, reinstall or move where it's located, you have to redo the symlinks and if you have a lot of tiles, it can be a bit tedious to click every single tile.

This feature would just be a button that creates all of your symlinks at once (for the tiles you have built).