CodeSnip Old Code (SVN)

Added code to support editing a snippet's display name.

Added new Display name edit control to Code page of Snippets Editor dialogue box. NOTE: Currently does nothing.
Changed size of tab sheets and rearranged various controls accordingly.

Revised layout of Extra information tab of Snippets Editor:
* Enlarged markup editor.
* Removed explanatory text frame.
* Renamed button that previews enter text to just "Preview".
Deleted HTML source document that was displayed in above explanatory text frame.

Added overloaded Manage method to TMemoCaretPosDisplayMgr to be able to use the first child memo control of a given parent control. This was done to allow a memo control in a frame to be managed without calling code to have to know name of frame's memo control.
Modified TSnippetsEditorDlg to use this new method to handle caret position in snippet extra editor frame.

Changed to use TSnippetsActiveTextEdFrame edit edit extra information instead of custom code supporting entering REML into edit control.

Changed re revised snippets editor frame.
Fixed some control alignment problems.

Made minimal changes to snippets editor to enable snippet description's active text to be edited either as plain text or REML. Uses new active text editor frame.

Rearranged controls on snippets editor's Code tab.

Renamed UActiveText, UActiveTextHTML, UActiveTextRTF & UActiveTextValidator units into ActiveText namespace as UMain, UHTMLRenderer, URTFRenderer and UValidator respectively.
Updated all using units as necessary.

Changed TSnippet.Description property from string to IActiveText.
Made minimal changes to other calling code to work with new property type. Most of these take a simplistic approach and / or don't work correctly and need urgent attention.

This commit only seeks to have code compiling correctly after change.