add [abdefs] object (methods: get, instances, del, clean) with an interactive dialog, add new element type for dialog_external

add warning for when there are more than two instances of the same abstraction (file-based and [ab]) being edited, fix for dirty visual markings

adapt canvas_getdir for ab instances, now they inherit ce_dir from root canvas. fix some implicit declarations and cast warnings

return a dummy object when creating [ab] objects during ab definitions loading, to prevent creation errors from being displayed. show the cycle that is causing the dependency problem when an ab object cannot to create

open instance canvas when first (empty) ab instance is created, dinamically created objects dont activate dirty flag, trigger initbang when saving current canvas

Jean-Michaël Celerier authored 4 years ago and Albert Gräf committed 4 years ago

Else this does not seem to build with MSVC 2019

The GitLab CI commands are now separated from the job definitions, using
YAML anchors.

The build and test commands should now show as separate, collapsible
sections in the job output (as documented at
https://docs.gitlab.com/ee/ci/pipelines/#custom-collapsible-sections).

The Debian image preparation is moved to before_script to separate it
from the build and test commands. Note that this adds an implicit 5 minute
time limit on this part of the script (see
https://gitlab.com/gitlab-org/gitlab-runner/-/issues/2716).

The commands are also now written once and copied using YAML anchors
(as documented at
https://docs.gitlab.com/ee/ci/yaml/README.html#yaml-anchors-for-before_script-and-after_script).