feat(app): toggle features based on agent API version (#2378)

* feat(agent): get agent's version from ping

* feat(agent): add version to api url

* feat(agent): query agent with api version

* feat(agent): rename agent api version name on state

* feat(agent): disable feature based on agent's api version

* style(agent): rename ping rest service + remove whitespaces

* style(state): remove whitespace

* style(agent): add whitespace

* fix(agent): remove check for error status 403

* refactor(agent): rename ping file name

* refactor(agent): move old services to v1 folder

* refactor(agent): turn ping service to usual pattern

* refactor(agent): change version to a global variable

* refactor(agent): move ping to version2

* refactor(agent): restore ping to use root ping

* fix(volumes): add volumeID to browse api path

* feat(volume): add upload button to volume browser

app/docker/components/host-overview/host-overview.js

@@ -6,6 +6,7 @@ angular.module('portainer.docker').component('hostOverview', {
     devices: '<',
     disks: '<',
     isAgent: '<',
+    agentApiVersion: '<',
     refreshUrl: '@',
     browseUrl: '@'
   },