remove `delete` action (backspace) on statements loaded

[jaromil]

After deleting a search the backspace hit deletes loaded statements, this should not happen.

Also handy to have esc and ctrl-g as keys to quit the / search.

Worth thinking if zenexplorer should start directly in "search mode" since we use it just for that, then / key is not needed.

[albertolerda]

The main issue about deleting statements is fixed.

esc key is enabled to exit the search.

What if the user wants to just "navigate" the statements? / is quite standard to start the search.

[jaromil]

@albertolerda maybe without delete statements is better and does not need restarting, but I expect to navigate with arrows or pg-updown, while all alphabetic keys activate search...

[albertolerda]

I see, the problem is that we don't have control easily over the search feature, it is implemented inside the list component of bubbletea.

[jaromil]

right, I forgot that, looked at it once. It's ok then thanks for fixing the delete was very annoying!!