feat(xo-web/home/pool): show # of *unique* available patches (#3483)

Fixes #3321

CHANGELOG.md

@@ -6,6 +6,7 @@
 
 - [Host/Networks] Remove "Add network" button [#3386](https://github.com/vatesfr/xen-orchestra/issues/3386) (PR [#3478](https://github.com/vatesfr/xen-orchestra/pull/3478))
 - [Host/networks] Private networks table [#3387](https://github.com/vatesfr/xen-orchestra/issues/3387) (PR [#3481](https://github.com/vatesfr/xen-orchestra/pull/3481))
+- [Home/pool] Patch count pill now shows the number of unique patches in the pool [#3321](https://github.com/vatesfr/xen-orchestra/issues/3321) (PR [#3483](https://github.com/vatesfr/xen-orchestra/pull/3483))
 
 ### Bug fixes
 

packages/xo-web/src/xo-app/home/pool-item.js

@@ -1,12 +1,9 @@
 import _ from 'intl'
 import Component from 'base-component'
 import Ellipsis, { EllipsisContainer } from 'ellipsis'
-import flatMap from 'lodash/flatMap'
 import Icon from 'icon'
-import map from 'lodash/map'
 import React from 'react'
 import SingleLineRow from 'single-line-row'
-import size from 'lodash/size'
 import HomeTags from 'home-tags'
 import Tooltip from 'tooltip'
 import Link, { BlockLink } from 'link'
@@ -14,6 +11,7 @@ import { Col } from 'grid'
 import { Text } from 'editable'
 import { addTag, editPool, getHostMissingPatches, removeTag } from 'xo'
 import { connectStore, formatSizeShort } from 'utils'
+import { flatten, map, size, uniq } from 'lodash'
 import {
   createGetObjectsOfType,
   createGetHostMetrics,
@@ -32,7 +30,7 @@ import styles from './index.css'
 
   const getMissingPatches = createSelector(getPoolHosts, hosts => {
     return Promise.all(map(hosts, host => getHostMissingPatches(host))).then(
-      patches => flatMap(patches)
+      patches => uniq(map(flatten(patches), 'name'))
     )
   })