Make gui.EventManager 100% typed.
Make gui.SelectionView, ops.EditInfo, and ops.OpInsertText 100% typed.
Make ops.OpRemoveText 100% typed.
Make ops.OpSplitParagraph 100% typed.
Make the operations OpAddAnnotation, OpAddCursor, OpAddMember, OpAddStyle,  OpApplyDirectStyling, OpApplyHyperlink and OpInsertImage 100% typed.
Make some operation classes 100% typed.
Make OperationFactory 100% typed.
Make OperationRouter and TrivialOperationRouter 100% typed.