New behavior for h and l

New behavior for h and l, will change tabs if there are no available
panes in the direction.

cargo clippy

Ensuring atomicity for the MoveFocusOrTab

- Blocking the input thread for the action MoveFocusOrTab
- Using "unreachable" macro in match arm to make it clear that the
directions Up and Down should not be used with the action MoveFocusOrTab

Adding tests

1 files changed, 2 insertions, 1 deletions

diff --git a/src/common/input/handler.rs b/src/common/input/handler.rs
index 78635237..aa204850 100644
--- a/src/common/input/handler.rs
+++ b/src/common/input/handler.rs
@@ -119,7 +119,8 @@ impl InputHandler {
             | Action::GoToNextTab
             | Action::GoToPreviousTab
             | Action::CloseTab
-            | Action::GoToTab(_) => {
+            | Action::GoToTab(_)
+            | Action::MoveFocusOrTab(_) => {
                 self.command_is_executing.blocking_input_thread();
                 self.os_input
                     .send_to_server(ServerInstruction::Action(action));