Drawing: skip apt if drawing command not found

apps/Drawing/uninstall

@@ -6,4 +6,7 @@ function error {
   echo -e "\\e[91m$1\\e[39m"
   exit 1
 }
-sudo apt purge -y drawing || error "apt failed to uninstall the 'drawing' package."
+
+if command -v drawing >/dev/null ;then
+  sudo apt purge -y drawing || error "apt failed to uninstall the 'drawing' package."
+fi