Rebuild 1.2.0 released

https://github.com/dmcoles/ReBuild/releases/tag/1.2.0

- fix getfile readonly code not being generated when TRUE
- use macros setting was not fully applied to all object definitions
- fix os4 issues with penmap and bitmap gadgets
- rename 'name' fields to 'label'
- add identifier field for all gadgets
- add child labels for gradient slider and palette gadgets
- add support for checkable/toggle/mutual menu items
- add 'move into vlayout' and 'move into hlayout' menu options
- implement reopen function
- add hint text option to all gadgets
- rename incorrect window gadget help label
- set window gadget help to default to true
- window activate flag defaults to true
- adding new gadget now inserts after currently selected gadget instead
of at the end
- add menu keyboard shortcuts
- add undo/redo capability
- save code preview and preview window positions to project file
- update project file format to v2
- add tooltype options for code previews and code preview window position
- settings saved to envarc:
- add realtime code preview window
- set selected item to root layout for new project
- make main window and code preview window remember their last positions
- add preview window width + height properties
- add link to vscroll to text field gadget
- add link to hscroll and link to vscroll to text editor gadget
- add link to slider gadget for integer gadget
- add horizontal scroll flag to texteditor
- throw an error on startup if neither textfield or texteditor gadgets
are present
- all gadget types now have label property
- set preview window settings based on window definition
- re-arrange some gadget settings pages to try to better fit them in
640*256
- Add an edit button on main window