A first step towards the new FSM. API-extension-based transitions still missing.
Remove unused plugin descriptor field.
Update name, introduction and description of plugin descriptors. (sitemap missing)
Fix error in JSON
Add sitemap plugin to Essentials.
Add PluginParameterService capability
Improve rebuild dialogue
Show tools as installed
Updating some plugins to use the pluginParameterService
Complete updating plugins for parameter service.
Merge branch 'ESSENTIALS-311'