debugger: Add horizontal scrollbar for frame item and tooltip for variables (#41261)

Coenen Benjamin created

Closes #40360 

I first tried to use an horizontal scrollbar also for variables but as
it's a List that can be collapsed it didn't feel natural so I ended up
adding a tooltip to have to full value of the variable when you hover
the item. (cf screenshots).




https://github.com/user-attachments/assets/70c4150d-b967-46b0-8720-82bbad9c9cca




https://github.com/user-attachments/assets/d0b52189-b090-4824-8eb7-2f455fa58b33



Release Notes:

- Added: for debugger UI horizontal scrollbar for frame item and tooltip
for variables.

Signed-off-by: Benjamin <5719034+bnjjj@users.noreply.github.com>

Change summary

crates/debugger_ui/src/session/running/stack_frame_list.rs | 1 +
crates/debugger_ui/src/session/running/variable_list.rs    | 1 +
2 files changed, 2 insertions(+)

Detailed changes