I propose adding an option to remove horizontal scrollbar in the source editor window. It would save a lot on screen estate on a laptop. In most cases, horizontal scrollbar is unnecessary (a user can use end key and cursor key to move to end of the line)
This option exists in Visual Studio 2008 - 2015).
Good suggestion.
This is the needed SCI_SETHSCROLLBAR API: Scintilla Documentation
Or, use this function in wxScintilla.