[bean completion proposals] polish the proposal appearance in the completion list

[martinlippert]

At the moment, the autowire bean completions show up as a list of plain bean names. This makes it sometimes look a bit weird, since it shows up side by side with, for example, methods you could invoke. Even the icon for the proposals look the same.

I think we need to change:

• the icon (the symbol kind) to something else.
• the label to include some additional information (like myController - inject as a bean dependency)

[BoykoAlex]

Addressed with b8322a0
Keeping opened for feedback

[martinlippert]

The details are a great step forward. I think we should also include the type of the bean that will be injected, probably excluding package information. WDYT @BoykoAlex ?

[BoykoAlex]

I've tried that and felt like too much text of displayed. I pushed changes in d595f03
The detail is shown next to the label same size fond but a bit greyed out. The description is aligned right smaller font size and greyed out. I'd just leave a short description "inject bean" but we can keep or re-arrange as you like :-)

[martinlippert]

Looks good to me. Like it!!! 👍