Update capybara to 2.2.1
Rename support file
Don't use let for find expressions
Refactor toggable support spec
Refactor select all link specs
Expect sort header before accessing the title
Make commented spec a pending one
Extract find calls to methods
Use methods instead of let for fresh results.
Merge pull request #1271 from opf/feature/update_capybara_to_2-2-1

[Feature] 7198 Intermittent database deadlock in Work package Capybara spec
Use variables to set highlight button background
Merge remote-tracking branch 'origin/fix/7608_make_highlight_buttons_styleable' into dev