Added auto completion in the EvalOCLDialog

[till-a]

Works for

• collection operations
• class members
• use-commands

Note: Autocompletion is currently integrated into the EvalOCLDialog only and not into the shell. As a result, only collection operations and class members are fully supported.

[till-a]

Would be great to accept suggestions by pressing <enter>. Reducing the suggested entries while typing would improve teh usabilty, too!

Both of these should work in 9739f1d11b57d80259d2a1a62cbf5c692b78b6c8 as the suggestions are now dynamically updated with every written character. To move through the suggested list the ArrowDown and ArrowUp keys can be used (also see documentation/documentation.md for keybinds).

[ichxorya]

May I ask how's the update going, since it's nearly a year from your last commit.