Model editors: Add "select all" action
Especially in diagram editors, and in particular when editing large
models, it is desirable to efficiently select all model elements using a
context menu entry or a keyboard shortcut (e.g., CTRL+A
).
When implementing this feature it should be checked if the “select all”
operation is also applicable to other parts of the GUI. E.g., in the
Model Navigator, CTRL+A
could select all model elements in the
current projects in case a model element in the project is currently
selected, or all projects, in case a project is currently selected.
(from redmine: issue id 3084, created on 2017-10-05, closed on 2018-09-26)