Sketch work package attributes listing on overview tab (WIP)
Add a partial directive to render panel expanders
Add a temporary unresponsive style fix for the panel expander
Hide meta attributes of work package properties
Move work package directives to work_packages/directives folder
Move wp details tab partial templates
Add default order for work package properties on overview tab
Add locals for work package properties on overview tab
Hack value formatting on work package overview tab
Slight code restructuring
Slightly more readable wp property formatting
Truncate description on overview tab by number of characters
Merge branch 'dev' into feature/panel-toggles

Conflicts:
	app/assets/javascripts/angular/work_packages/controllers/work-package-details-controller.js
	public/templates/tabs/overview.html
User gravataars
Handle the first wp property row specification on overview tab
Specification second property row on wp overview tab


=> https://www.openproject.org/work_packages/8732
Created API attachment model
Created API attachment representer
Created show attachment API endpoint
Merge pull request #1552 from opf/feature/api-create-attachments-show-endpoint

Feature/api create attachments show endpoint