Add drop-down for macro insertion/editing to Rich Text Editor

The Rich Text Editor should enable the insertion of macros using a Macro drop-down that lists all available macros. Once a macro is selected, a popup should appear with Insert and Cancel buttons, and a list of parameter description and value pairs retrieved from the macro. The parameter entry method should match the value type, eg boolean as checkbox, dropdown for preset choices, text for others. Context-specific macros such as column and section can be excluded.