+ O_EDGE_INSERT_STAY
+ When inserting into a field up to the boundary position,
+ optionally delay the scrolling, so that the last inserted
+ character remains visible, but advance the cursor to reflect the
+ insertion. This allows the form library to display the inserted
+ character in one-character fields as well as allowing the library
+ to maintain consistent state.
+
+ O_INPUT_FIELD
+ The <B>set_max_field</B> function checks for this extension, which allows
+ a dynamic field to shrink if the new limit is smaller than the
+ current field size.
+