Make create/append actions context aware

[nikku]

Is your feature request related to a problem? Please describe

As a user I'm confronted with a large list of choices in the create, replace, and append menu. While usually I just want to continue to model the way I am used to (i.e. service task only in microservice orchestration case).

Describe the solution you'd like

Rather than showing a huge list of options, only show what the user is likely to use; make everything else discoverable as a second look (i.e. via search or view more).

Describe alternatives you've considered

Stick to "static" nature of these menues.

Additional context

Raised as feedback by @marstamm, too.