Update

- Changes to the storing of board rotation data for various screens. Rather than storing the rotation data against the type of screen, the data is stored against the board. Where board designs aren't used (e.g. in the Pairs game), the rotation data is stored as before.
- Changes to the word wrapping and placement in info and history panels to better use the space available.
- Fixed showing the time taken to find a word in the Wordsearch and Word hunt games.
- Revised colour map files. Fixed ability to see gizmo mode control when using Sith colour scheme.
- Reinstate the zoom in the background designer.
- Fix issue that the brush size panel in the board background designer couldn't move to the base of the screen/window.
- Fixed caching issue with thumbnail images when design updates saved (e.g. when modifying a Voxel design).