#enabled: for tool bar buttons

[HPI-SWA-Bot]

Author: @krono

Message:
Put a selector to #enabled: for each button, for example for "Commit", so that it is not enabled when there's no proper selection

[krono]

"..."

	commitButton := builder pluggableActionButtonSpec new.
	commitButton
		model: self;
		label: 'Commit';
		enabled: #hasProjectSelection;
		action: #actionCommit;
		help: 'Commit your current changes.'.
"..."

hasProjectSelection

	^ self projectIndex > 1 and: [self projectList size >= self projectIndex]