LU LSP bugs

[vishwacsena]

Describe the bug

In playing with the auto-suggest, auto-complete capabilities for LU, I ran into the following issues -

1. Picking from the entity type (list) adds the entity type without a space and the parser complains of no space. We should not auto-complete content that will result in known parser errors.

repro: 
1. Type '@' and wait for the entity type auto-suggest UI
2. Pick list entity type 

2. Adding sub-lists in list entity definition is missing space after ‘-‘

repro:
1. Type '@ list city = ' and hit enter. Notice '- ' auto-complete for normalized value.
2. Type 'seattle : ' and hit enter
3. Notice we no longer offer auto-complete '- ' with appropriate indentation for sub-lists

3. Hyphen stops working on new utterances on new intent added after entity definition

repro:
1. Add an intent section - e.g. 
# greeting 
- hello
2. Then add an entity definition - e.g. 
@ ml testEntity
3. Then add another intent section - e.g. '# testIntent' and hit enter
4. Notice the auto-complete for '- ' no longer works.

4. No hyphen auto-inserted after @ phraselist todoItem =

repro:
1. Type '@ phraselist test = ' and hit enter. We should auto-complete each line with '- ', this is just a list of values similar to intent definition. 

5. No auto-suggest for (interchangeable) for phrase list


repro: 
1. Type ' @ phraselist test(' 
We should offer auto-complete for '@ phraselist test(interchangeable)'

Version

Browser

• Chrome
• Safari
• Firefox
• Edge

OS

• macOS
• Windows
• Ubuntu

[cwhitten]

addressed via #2046