Include RegExp to remove multiple whitespaces.
Rename SettingsPageViewModel to SettingsViewModel.
Clear up ItemPageViewModel.cs
Updated ApplicationSettings for easier use and added viewModelBase.
Update the implementation of dataTransferManager.
Update the CSS generation method.
Remove useless properties from ItemPageViewModel.cs
Update ItemPage.xaml for Windows.
Update MainPage.xaml for Windows.
Revert "Update the implementation of dataTransferManager."

This reverts commit 0bb58ec47bb0754552a2c581aea5b58bb8f3215c.
Revert "Revert "Update the implementation of dataTransferManager.""

This reverts commit ae112a7a3520a72c3a8b3b41a5161466b0fb99a7.
Revert "Update the CSS generation method."

This reverts commit 3b20ddac33532a12befbcfcf97e6a8ba98ca8182.