Bag of Words: add option to show bow features

[ajdapretnar]

Issue

Fixes #498.

Description of changes

Add a checkbox to set 'hidden' attribute of attributes to True. Added to the base widget, so now both Bag of Words and SimHash use this option.

Includes

• Code changes
• Tests
• Documentation

[nikicc]

Codecov Report

Merging #499 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #499      +/-   ##
==========================================
+ Coverage   63.00%   63.02%   +0.02%     
==========================================
  Files          59       59              
  Lines        6265     6293      +28     
  Branches      823      828       +5     
==========================================
+ Hits         3947     3966      +19     
- Misses       2180     2188       +8     
- Partials      138      139       +1     

[codecov-io]

Codecov Report

Merging #499 into master will increase coverage by 0.02%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #499      +/-   ##
==========================================
+ Coverage      63%   63.02%   +0.02%     
==========================================
  Files          59       59              
  Lines        6265     6293      +28     
  Branches      823      828       +5     
==========================================
+ Hits         3947     3966      +19     
- Misses       2180     2188       +8     
- Partials      138      139       +1

[nikicc]

Codecov Report

Merging #499 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #499      +/-   ##
==========================================
+ Coverage   63.00%   63.02%   +0.02%     
==========================================
  Files          59       59              
  Lines        6265     6293      +28     
  Branches      823      828       +5     
==========================================
+ Hits         3947     3966      +19     
- Misses       2180     2188       +8     
- Partials      138      139       +1     

[codecov-io]

Codecov Report

Merging #499 into master will increase coverage by 0.67%.
The diff coverage is 88%.

@@            Coverage Diff             @@
##           master     #499      +/-   ##
==========================================
+ Coverage      63%   63.67%   +0.67%     
==========================================
  Files          59       59              
  Lines        6265     6296      +31     
  Branches      823      827       +4     
==========================================
+ Hits         3947     4009      +62     
+ Misses       2180     2152      -28     
+ Partials      138      135       -3

[ajdapretnar]

I fixed the changing input.
But...
How did this test pass in the first place:

def test_hide_attributes(self):
        self.send_signal("Corpus", self.corpus)
        new_corpus = self.get_output("Corpus")
        self.assertTrue(all(f.attributes['hidden'] for f in
                            new_corpus.domain.attributes))
        self.widget.controls.hidden_cb.setChecked(False)
        self.assertFalse(all(f.attributes['hidden'] for f in
                            new_corpus.domain.attributes))

[PrimozGodec]

any would fit better here -- in this case, it does not make difference but is more correct - just in case.

[ajdapretnar]

Fixed.

[nikicc]

Codecov Report

Merging #499 into master will increase coverage by 0.67%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #499      +/-   ##
==========================================
+ Coverage   63.00%   63.67%   +0.67%     
==========================================
  Files          59       59              
  Lines        6265     6296      +31     
  Branches      823      827       +4     
==========================================
+ Hits         3947     4009      +62     
+ Misses       2180     2152      -28     
+ Partials      138      135       -3     

[PrimozGodec]

That is good now. Thanks. :)