Don't insert text from keys like super-i

While at it, use declaration order for modifiers.

src/input_common.rs

@@ -580,10 +580,10 @@ pub(crate) fn terminal_protocols_disable_ifn() {
 
 fn parse_mask(mask: u32) -> Modifiers {
     Modifiers {
-        sup: (mask & 8) != 0,
         ctrl: (mask & 4) != 0,
         alt: (mask & 2) != 0,
         shift: (mask & 1) != 0,
+        sup: (mask & 8) != 0,
     }
 }
 

src/key.rs

@@ -77,10 +77,10 @@ const fn new() -> Self {
         m
     };
     pub(crate) fn is_some(&self) -> bool {
-        self.ctrl || self.alt || self.shift
+        *self != Self::new()
     }
     pub(crate) fn is_none(&self) -> bool {
-        !self.is_some()
+        *self == Self::new()
     }
 }