removed the fix setting min-width to all select2 containers, I believe it is unnecessary with width: 'resolve'  and dropdownAutoWidth: true settings
ToolForm: Fix subsection creation
Visualizations registry: do not warn when a plugin is set to 'disabled' - use info
tweaks to UI for library import, also added ext types and genome selection
Merge
Ui: Fix option fields
Merge
Fix page title on tool shed categories page, as pointed out by Greg.
ToolForm/Ui: Improve and extend option fields, add dataset/collection selector
Charts: Fix selection grid
Reduce code duplication between job metrics and dependency resolution plugins.
Same code reused again downstream in workflow schedulers plugin framework.
Allow loading dependency resolvers and job metrics from YAML instead of XML.
Mostly for downstream Pulsar configuration improvements - but I don't see a reason not to allow this in Galaxy as well.

Besides simply being more pleasant to write - having everything configurable by Python dictionary should enable easier automation and programatic configuration of these job running systems.