Adds specs
Fixes icon caption
Re-implements toggle method with jQuery
Sets (un)check all button status
Sets table header according to sort state
Gives delete watcher button context
Adds missing timelines toolbar labels
Adds title to delete watcher link

- removes text decoration on hover for delete watcher link
Fixes cukes
Update change log (#4123)
Merge pull request #906 from opf/fix/icon_link_table_comprehensibility

[FIX] Icon link table comprehensibility 4123