Show error dialog if opening liveview is failed
Not to refresh CameraManager if going back to MainPage
Fix base color on histogram
Fix string "DayLight" in ja-JP
Minor layout adjustment
Not to use CameraManager in ViewerPage
Merge branch 'hotfix_liveview' of github.com:kazyx/WPPMM into hotfix_liveview
Handle HTTP status Gone
Show progress while downloading picture