[Improvements] Small (common) Things

[dev-inside]

Hey Klaus,

I wanted to share a few ideas that could really enhance the usability of Quant UX, in my opinion:

• Locking elements or layers, similar to what you find in Photoshop, Affinity, or Penpot.
• Adding a shortcut (CTRL+X) to cut out a selection.
• Allowing separate styling for placeholders and input text in input fields.
• For validation, it would be great to show custom widgets (like tooltips) as error messages, not just labels.
• Import of Fonts is tricky and honestly painful. It would be great to import a font-family from fontsource, google fonts or coolabs fonts and have the options like their font-weight (like 300 for thin, 400 for regular etc.)

These are just a few small things I’ve noticed. If you have any questions or want to discuss further, then let me know 👍 . Thanks for all the great work you’re doing!