- changed height: 0px to height: auto for uk.treeview-menu to fix not smooth treeview closing
- fixed .content-wrapper calc, it returned -2% before
- changed order of js file generation
- rebuild dist files

- updated repository url in package.json
- updated copyright infos for js in Gruntfile.js
- updated copyright infos for css in AdminLTE.less & AdminLTE-without-plugins.less
- rebuild dist files

- added code from #2001 thanks @CoderSquirrel

Closes #1854 & #2001