### Problem description
This PR implements the feature request described in #1995, that
describes a problem with the `Paste` vs `Paste all` commands. Users
could be thrown off by having `Ctrl+V` act as a simple "Paste over
selection", whereas it's generally accepted as a "Paste all".
### Implementation description
<!-- Explain what you did to correct the problem -->
This PR introduces a new setting, called "Paste behaviour" (under the
"Hex Editor" category).
This setting has three values:
- `Paste over selection`: the current implementation for ImHex. Pastes
only over the selection region, in this case pasting only one byte;
- `Paste everything`: allows ImHex's `Paste` to behave like a `Paste
all` when selecting one-byte regions;
- `Ask me next time`: prompts the user for a choice of behaviour
(default value).
*Note: as users generally use `Paste all` when selecting one-byte
regions, calling `Paste` when selecting over two or more bytes is not
affected by this change, and will still behave like the usual `Paste`
command.*
When selecting a one-byte region, and calling the Paste command, users
that have not defined a preferred behaviour in the settings will be
prompted to choose one, using a brand new popup. The popup also allows
the user to cancel, which will not change the settings' value, and will
cancel the paste action altogether.
### Screenshots
The new popup:
The new setting:
### Additional things
I'm not very good with long descriptions, so I'm open to any suggestions
regarding the text that is included in the popup!
I do think however that we should keep a hint indicating that `Paste
all` is always an option, which could solve the issue altogether for
very new users.
---------
Signed-off-by: BioTheWolff <47079795+BioTheWolff@users.noreply.github.com>
Co-authored-by: Nik <werwolv98@gmail.com>
