admin-ui: Add func to remove item from selected-items table

Fix apyrgio/synnefo#103
admin-ui: Fix JS bug
admin-ui: Update icon-font

Add icon for info.
admin-ui: Add funcs and style for details page and buttons
admin-ui: Minor JS improvement
admin-ui: Fix JS bug in selection of multiple lines

Fix apyrgio/synnefo#66
admin-ui: Set clear-all btn disabled when no items are selected
admin-ui: Update text of show-hide-all button

When a user expands/collapses all the items of a category the text
of the button adjusts.

Fix apyrgio/synnefo#98
Merge branch 'feature-admin-ui-new' into feature-admin