Move Time Machine into its own nav tab with "Flux Capacitor" icon

ui/src/side_nav/containers/SideNav.tsx

@@ -78,12 +78,20 @@ class SideNav extends PureComponent<Props> {
           <NavHeader link={`${sourcePrefix}/hosts`} title="Host List" />
         </NavBlock>
         <NavBlock
-          highlightWhen={['data-explorer', 'delorean']}
-          icon="graphline"
+          highlightWhen={['data-explorer']}
+          icon="graphline-2"
           link={dataExplorerLink}
           location={location}
         >
           <NavHeader link={dataExplorerLink} title="Data Explorer" />
+          {/* <NavHeader link={`${sourcePrefix}/delorean`} title="Time Machine" /> */}
+        </NavBlock>
+        <NavBlock
+          highlightWhen={['delorean']}
+          icon="capacitor2"
+          link={`${sourcePrefix}/delorean`}
+          location={location}
+        >
           <NavHeader link={`${sourcePrefix}/delorean`} title="Time Machine" />
         </NavBlock>
         <NavBlock
@@ -96,7 +104,7 @@ class SideNav extends PureComponent<Props> {
         </NavBlock>
         <NavBlock
           highlightWhen={['alerts', 'alert-rules', 'tickscript']}
-          icon="triangle"
+          icon="alerts"
           link={`${sourcePrefix}/alert-rules`}
           location={location}
         >
@@ -158,7 +166,7 @@ class SideNav extends PureComponent<Props> {
         </Authorized>
         <NavBlock
           highlightWhen={['manage-sources', 'kapacitors']}
-          icon="cog-outline"
+          icon="wrench"
           link={`${sourcePrefix}/manage-sources`}
           location={location}
         >