Autocomplete from script interpreter repeats letters

[Martyn Gigg]

To reproduce:

• Open up MantidPlot & the script command interpreter (F4);
• start typing from nu, the autocomplete box will appear after the u is entered
• now type m.
• the autocomplete box disappears but you are left with two m characters!

[Martyn Gigg]

Fix autocompletion character repetition in interpreter. Refs #5153

If the list was active then the event was processed twice by the base class.

Changeset: c56d7ee67351d44957fb0fad1249504a8906f380

[Martyn Gigg]

Fix autocompletion character repetition in interpreter. Refs #5153

If the list was active then the event was processed twice by the base class.

Changeset: c56d7ee67351d44957fb0fad1249504a8906f380

[Roman Tolchenov]

Autocomplete box works correctly

[Stuart Campbell]

This ticket has been transferred to github issue ​5999