Fix context menu in command editor
Add support to show replace panel when inputting Ctrl+H

and adjust solution
Implement load and save settings
Fix binding error for TextEditorOptions
Improve setting flip to change some settings

Add many settings for editor
Remove QuoteMode property
Remove AvalonDock and Add WPF Toolkit / Extended WPF Toolkit
Adjust scrollbar size
Adjust setting flip
Fix bug that a operator of target selector is not generated correctly
Update definition of syntax highlight #2