Use glm::clamp
Remove unused declaration
Use camera roll when creating view matrix
Extract LookAt function
Remove broken tests
Add test for test data
Fix broken test
Remove GraphicsUtility files
Rename function and parameter
Return matrix by value
Assert non null pointer
Remove vector
Remove null checks
Indentation
Remove duplicated CheckboxWidget drawing
Remove unnecessary renderer state changes
Rename field
Use strong type for savegame handles, rename fields
Properly align checkbox widget mouseover area, fixes #528
Add text widget constructor default parameters