ui: vocabulary: terms: better .popovers (fixes hanging-double-popover-error)

commit 17c8084506bb88f309f37ee3f8dd9ab41b670c2a
Author: Max F. Albrecht <1@178.is>
Date:   Thu Jul 24 11:58:27 2014 +0200

    make sure popover stays within body w/ 10px padding

commit 98131877795423349ea8bb873bc735ef5dc39cc7
Author: Max F. Albrecht <1@178.is>
Date:   Wed Jul 23 17:43:51 2014 +0200

    vocabulary: popover: small padding on top, xtrasmall on left

commit e66522c67b0e4b40dae1952c1a8449d20c049577
Author: Max F. Albrecht <1@178.is>
Date:   Thu Jul 24 11:36:16 2014 +0200

    remove unused CSS

commit a3b8676f29e11ca941e236c809d76740ca51cfb1
Author: Max F. Albrecht <1@178.is>
Date:   Thu Jul 24 11:35:41 2014 +0200

    fix stay-on-screen-error, better use of .popover library, no animation

commit ec6aa63ec80aa2ddae0c948be733a814df09bf4e
Author: Max F. Albrecht <1@178.is>
Date:   Wed Jul 23 17:43:24 2014 +0200

    vocabulary: fix filter mode buttons: reset filter before applying 'used'