agent_ui: Fix keybinding conflict with action to clean up the queue (#47254)

Danilo Leal created 

This PR frees up `shift-backspace` to work as it did before. Now, the
action to remove the first queued message is now assigned to the
`cmd-shfit-backspace` keybinding, whereas the action to clear the entire
message queue is assigned to `cmd-alt-backspace`.

Release Notes:

- N/A

Change summary

assets/keymaps/default-linux.json   | 4 ++--
assets/keymaps/default-macos.json   | 4 ++--
assets/keymaps/default-windows.json | 4 ++--
3 files changed, 6 insertions(+), 6 deletions(-)

Detailed changes

assets/keymaps/default-linux.json 🔗 

@@ -309,9 +309,9 @@
       "ctrl-enter": "agent::ChatWithFollow",
       "ctrl-shift-enter": "agent::SendImmediately",
       "ctrl-shift-alt-enter": "agent::SendNextQueuedMessage",
-      "shift-backspace": "agent::RemoveFirstQueuedMessage",
+      "ctrl-shift-backspace": "agent::RemoveFirstQueuedMessage",
       "shift-e": "agent::EditFirstQueuedMessage",
-      "ctrl-shift-backspace": "agent::ClearMessageQueue",
+      "ctrl-alt-backspace": "agent::ClearMessageQueue",
       "ctrl-shift-v": "agent::PasteRaw",
       "ctrl-i": "agent::ToggleProfileSelector",
       "shift-tab": "agent::CycleModeSelector",

assets/keymaps/default-macos.json 🔗 

@@ -357,9 +357,9 @@
       "cmd-enter": "agent::ChatWithFollow",
       "cmd-shift-enter": "agent::SendImmediately",
       "cmd-shift-alt-enter": "agent::SendNextQueuedMessage",
-      "shift-backspace": "agent::RemoveFirstQueuedMessage",
+      "cmd-shift-backspace": "agent::RemoveFirstQueuedMessage",
       "shift-e": "agent::EditFirstQueuedMessage",
-      "cmd-shift-backspace": "agent::ClearMessageQueue",
+      "cmd-alt-backspace": "agent::ClearMessageQueue",
       "cmd-shift-v": "agent::PasteRaw",
       "cmd-i": "agent::ToggleProfileSelector",
       "shift-tab": "agent::CycleModeSelector",

assets/keymaps/default-windows.json 🔗 

@@ -311,9 +311,9 @@
       "ctrl-enter": "agent::ChatWithFollow",
       "ctrl-shift-enter": "agent::SendImmediately",
       "ctrl-shift-alt-enter": "agent::SendNextQueuedMessage",
-      "shift-backspace": "agent::RemoveFirstQueuedMessage",
+      "ctrl-shift-backspace": "agent::RemoveFirstQueuedMessage",
       "shift-e": "agent::EditFirstQueuedMessage",
-      "ctrl-shift-backspace": "agent::ClearMessageQueue",
+      "ctrl-alt-backspace": "agent::ClearMessageQueue",
       "ctrl-shift-v": "agent::PasteRaw",
       "ctrl-i": "agent::ToggleProfileSelector",
       "shift-tab": "agent::CycleModeSelector",