Add an autosuggest widget to the "open" dialog that does searching and path traversal

The "open" dialog of the console can easily be extended with an autosuggest widget that displays nodes from various sources using the current input like:

• UUID identifier "d6d6b530-e147-46a7-9184-c2188cefde73"
• path traversal "/hippo:" "./hippo" "../../hippo" "hippo/tmp"
• text search "animal powerful water"