* Added sort filter proxy model for gem model that can filter based on name, gem origin, supported platform, features and/or types.
* Added new filter pane on the left with several filter categories for gem origin, type, platform and feature.
* Added filter category widget which is a collapsable generalized checkbox group that can interact with the proxy model and thus control filtering.
* Removed fixed size of the project manager. The application should always be resizable.
* [LYN-2520] Gem Catalog - Gem Inspector / Info Panel
* Extended the gem info with a directory and documentation link, binary size in bytes and added some helper functions.
* Added the gem inspector widget that hooks into the selection model.
* Info panel is vertically scrollable and based on the UX designs.
* Added a gem sub widget which holds several gem tags, a title and a description and is reused for the depending and conflicting gems.
* Extended the gem model with several new roles and data elements.
* Added more gem info test data before we got access to the real data.
Benjamin Jillich