Support the short "-I" option for all CLI arguments that take an image

Let's support this short form everywhere for consistency (plus it's
handy to remember and type).
All other "limit" arguments already support it.

Signed-off-by: Michael Weiss <michael.weiss@eviden.com>

src/cli.rs

@@ -289,6 +289,7 @@ pub fn cli() -> Command {
                 )
                 .arg(Arg::new("image")
                     .required(false)
+                    .short('I')
                     .long("image")
                     .value_name("IMAGE")
                     .help("Limit listed submits to submits on IMAGE")
@@ -1100,6 +1101,7 @@ pub fn cli() -> Command {
 
                     .arg(Arg::new("filter_image")
                         .required(false)
+                        .short('I')
                         .long("image")
                         .value_name("IMAGE")
                         .help("List only containers of IMAGE")