Patch 5.1.0

Patch 5.1.0 has arrived!

-----------------------------------------------------------------------
- 5.1.0 Changelog
-----------------------------------------------------------------------

* Maps
- Removed the obsolete Svarinshaug custom map.
- Fixed issue which caused maps in the user map folder to not appear the Custom Game menu.
- Removed the Aquitania custom map.

* Miscellaneous
- Saved games are now stored in /Wyrmsun/save, instead of in the game's directory.

* Scenarios
- Fixed issue which caused some of the Western Migration triggers to not work properly.

* Terrain
- The dirt, dry mud, ice and mud transition graphics have been updated.
- Added new dirt and ice decoration tiles.

* Units
- Added Brown Bear, Black Bear and Polar Bear unit types. Brown bears are now generated in the Earth/Europe scenario map.

* User Interface
- Fixed issue which caused dropdowns to gain keyboard focus when clicked.
- Fixed issue which caused text fields to not lose keyboard focus when clicked away from.
- Fixed issue which caused key events to be propagated to buttons even though a text field had focus.
- Reworked the in-game menu to be QML-based.