UI improvements

[ketsuban]

• Removed font override (0.7rem is tiny)
• Removed oversized min-width on opcode table

[izik1]

Hi @ketsuban, thank you for your PR, I really do appreciate it.

I'm not going to close this, as I'm open to discussion, however, I don't particularly like these changes as is:

• Changing the font size there causes the table to 2d scroll, which I try to avoid
• The min-width is a hack to avoid stuff like the image below text (overflow)