Scroll line with error indication into view in the text editor

[magjac]

If there is an error in the DOT source code, but the error indication is not in the visible area of the text editor, it can be hard to find where the error is if the DOT source code is large. A function that scrolls the line with the error into view would simplify this.

Ideas:

• Scroll automatically when an error occurs.
  • Probably requires some kind of filtering to avoid interfering with user scrolling.
    • No scroll if the error message and line number does not change.
    • No scroll if the error message and line number as counted from the end of the file does not change.
• Scroll on user command.
  • Through a keyboard shortcut?
  • Through a button somewhere (not shown when error free)?