Remove duplicated config code for filtered search dropdowns
There are currently duplicated code that do the same thing for filtered search dropdowns. We should consolidate it so that there is one SSOT.
#js-dropdown-author.filtered-search-input-dropdown-menu.dropdown-menu
{ data: { icon: 'pencil', hint: 'author', tag: '@author' } }
...
#js-dropdown-assignee.filtered-search-input-dropdown-menu.dropdown-menu
{ data: { icon: 'user', hint: 'assignee', tag: '@assignee' } }
...
#js-dropdown-milestone.filtered-search-input-dropdown-menu.dropdown-menu
{ data: { icon: 'clock-o', hint: 'milestone', tag: '%milestone' } }
...
#js-dropdown-label.filtered-search-input-dropdown-menu.dropdown-menu
{ data: { icon: 'tag', hint: 'label', tag: '~label', type: 'array' } }https://gitlab.com/gitlab-org/gitlab-ce/blob/master/app/views/shared/issuable/_search_bar.html.haml
const tokenKeys = [{
key: 'author',
type: 'string',
param: 'username',
symbol: '@',
}, {
key: 'assignee',
type: 'string',
param: 'username',
symbol: '@',
}, {
key: 'milestone',
type: 'string',
param: 'title',
symbol: '%',
}, {
key: 'label',
type: 'array',
param: 'name[]',
symbol: '~',
}];