fix: improve distinction between Boot and Shutdown icons

in the tray menu, they are small enough and close enough in shapes that they are fairly indistinguishable from eachother.

Author: starpit

plugins/plugin-client-default/icons/png/playTemplate.png

@@ -20,7 +20,6 @@ import profile from "@kui-shell/client/icons/png/profileTemplate.png"
 import bug from "@kui-shell/client/icons/png/bugTemplate.png"
 import powerOff from "@kui-shell/client/icons/png/powerOffTemplate.png"
 import play from "@kui-shell/client/icons/png/playTemplate.png"
-import stop from "@kui-shell/client/icons/png/stopTemplate.png"
 
 import { join } from "path"
 
@@ -35,4 +34,4 @@ export const profileIcon = iconFor(profile)
 export const bugIcon = iconFor(bug)
 export const powerOffIcon = iconFor(powerOff)
 export const bootIcon = iconFor(play)
-export const shutDownIcon = iconFor(stop)
+export const shutDownIcon = iconFor(powerOff)