keys: ctrl-shift-1 didn't switch to the first tab

When using `key_map_preference="Mapped"`, `ctrl-shift-1` is actually
`ctrl-shift-!` in a US layout.

This commit adds the us-layout mapping for shifted number keys to
allow that to work, but it is worth calling out that this will only
be meaningful in layouts that have the same US mapping for the number
keys.

refs: https://github.com/wez/wezterm/issues/2623

docs/changelog.md

@@ -94,6 +94,10 @@ As features stabilize some brief notes about them will accumulate here.
   [#2572](https://github.com/wez/wezterm/issues/2572)
 * Panic when hitting enter in launcher menu when no fuzzy results match
   [#2629](https://github.com/wez/wezterm/issues/2629)
+* Default `CTRL-SHIFT-<NUM>` assignments didn't work on Windows and X11
+  systems when `key_map_preference = "Mapped"`
+  [#2623](https://github.com/wez/wezterm/issues/2623)
+
 
 #### Changed
 * Removed Last Resort fallback font

wezterm-gui/src/commands.rs

@@ -30,8 +30,16 @@ pub enum ArgType {
 /// a handful of default assignments in the command DEFS below.
 fn us_layout_shift(s: &str) -> String {
     match s {
-        "0" => ")".to_string(),
+        "1" => "!".to_string(),
+        "2" => "@".to_string(),
+        "3" => "#".to_string(),
+        "4" => "$".to_string(),
         "5" => "%".to_string(),
+        "6" => "^".to_string(),
+        "7" => "&".to_string(),
+        "8" => "*".to_string(),
+        "9" => "(".to_string(),
+        "0" => ")".to_string(),
         "[" => "{".to_string(),
         "]" => "}".to_string(),
         "=" => "+".to_string(),