Removed modules _smb_
GUI: implemented scrollable suggestion list for filter widget

- Implemented scrollable list of suggestions for filter widget.
  - They now do not overflow from browser window (max. 300px height).
  - Navigation by keyboard is kept and scroll position follows selected items.
  - Automatic padding change if scrollbar visible to ensure items are not hidden.
- Change is made by using modified sources of original widget located in
  original package. This will ensure using our implementation instead of native
  and prevent need to implement a lot of other classes which work with SuggestBox.
Merge pull request #254 from zlamalp/suggest

GUI: implemented scrollable suggestion list for filter widget
Merge pull request #255 from papperwing/remove_smb_

Removed unused modules for _smb_ attributes.
GUI: implemented many usability fixes

- Reimplemented headers of inner tabs (longer ends with ellipsis).
- Shorten most of inner tab headers (context is present in gui header anyway).
- Added non-clickable screen-shield below all inner tabs, so user can't
  accidentally click on underlaying tab content.
- Added input validation to QuotaChangeRequest tab.
- Updated design of ExecService's details page
- Allow to edit ExecService details (enable/disable).
- Updated some adding tabs to allow incremental adding with
  notice, what was already added (member to groups, group to resources).

- Added filtering on service required attributes.
- Updated ExecService to be PerunBean.
- Added callback to update ExecService.
RPC: updateExecService must return updated object

- updateExecService() method in RPC now returns updated object,
  which is needed for GUI and now behave like core update methods.
GUI: improved layout of create resource dialog

- Fixed layout of second page of create resource.
- Shorten inner tab title only for small tabs.
- Remember last selection when refresh on vo/group applications tab.
- Shorter title in rest of small inner tabs.
- Unified naming of tabs for application forms / notifications.
Merge pull request #256 from zlamalp/fixup

GUI: many usability fixes
GUI: support for CESNET's linker form item

 - if form item with div#cesnet_linker_wrapper is found. It's moved in DOM and loading
   script is appended. Also GUI is moved down to reserve space for linker.