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edit
Changes
→IO_TextEdit
Each line can be edited using the io_edit. If during the process of editing the string is shifted, make sure all lines are shifted together. If in overstrike mode hitting the enter key goes to next line. Otherwise (in insert mode) it should insert a new line after the current line and if there is any data after the current position, the data should be cut, and pasted to the newly created line. The cursor should stand at the beginning of the new line.
Up and Down arrows should focus the editing on previous and next lines respectfully and if needed, to accommodate this the lines should shift to up and down. However, However if UP and Down keys are hit on the first or last line of data, then the function will terminate returning those values.
Page up and down should scroll the lines in the text field up and down "height-2" times, or better to say, scroll the text a page up or down if possible. if paging is not possible, then the keys are ignored.
