SearchHistory test
Explicit return
Clear SearchHistory before each test
Don't access to disallowed key in a restricted hash.
Rename `cbox` as `cbox_pos`
Remove Example-related stuff once and for all
Should be `return $self` here
Add `rel_type` table
Add `cbox_rel` widget to set a type of relation between the words
Fill `rel_type` column
Rename `Dict::Learn::Frame::AddWord::Translations` as `Dict::Learn::Frame::AddWord::LinkedPhrases`
Put `cbox_rel` next to `btn_additem` buthon rather than at the beginning of each linkedphrase item