Add more cursor movements

[sebashwa]

Hey,

thanks for creating this app, I like it a lot! I thought it might make sense to provide more cursor movement / input editing keybindings. To start with Ctrl-w (word deletion) seemed useful to me in order to delete i.e. a database filter query quickly.

Following changes are included in this PR so far:

• [x] Refactor logic for keyboard input into a separate util struct
• [x] Add tests for existing cursor movement functions
• [x] Allow database selection from list while filter is focused
• [x] Fix databases component to update directly after keystroke in filter
• [x] Add Ctrl-w to delete backwards until next whitespace
• [x] Add Alt-Backspace to delete backwards until next non alphanumeric char
• [x] Add Ctrl-b to navigate backwards one char
• [x] Add Ctrl-f to navigate forwards one char
• [x] Add Ctrl-d to delete char under cursor
• [x] Add Alt-b to navigate backwards until next non alphanumeric char
• [x] Add Alt-f to navigate forwards until next non alphanumeric char
• [x] Add Alt-d to delete forwards until next non alphanumeric char

Any feedback (especially concerning the refactoring) very welcome, as I am not super proficient writing Rust so far.

sebashwa

[TaKO8Ki]

Sorry for the late review. I will review when I have time.

[sebashwa]

Sorry for the late review. I will review when I have time.

Hey, no worries and thanks for taking the time! From my point of view it is pretty complete now. I hope it didn't grow too big.