Cutter GUI trimms shell code to whole bytes (might discard last nibble) #2831

Environment information

• Operating System: linuxmint 20.2
• Cutter version: 2.0.3
• File format: any
• Arch: N/A
• Type: N/A

Describe the bug
Cutter open shell code gui trimms shell code to whole bytes (might discard 1 nibble)

To Reproduce
Steps to reproduce the behavior:

1. Launch Cutter
2. Enter odd number of nibbles
3. Click ok
4. See information loss

Expected behavior

1. Fill the last lonely nibble with a 0-nibble so no information is discarded.
2. When no shell code is entered proceed with empty input OR grey out the OK-button.

Screenshots