[whiteboards] Text with colon pasted as URL

[pstuifzand]

What happened?

The isValidURL function validates pieces of pasted text as urls, when it really should be text.

I pasted Was: x becomes y as text from a text document on a whiteboard and a "browser" shape was created, when it should have been a whiteboard block. I also pressing shift at the same time, but that also created an iframe. Also dragging from the text editor created an iframe.

Reproduce the Bug

1. Open a whiteboard
2. Type "was: x becomes y" in a text editor
3. Copy the text, or drag to text to the whiteboard
4. An iframe shape is created

Expected Behavior

It should create a whiteboard text block

Screenshots

Desktop Platform Information

Linux Ubuntu 20.04.
Logseq 0.8.8+nightly20221017

Mobile Platform Information

No response

Additional Context

No response

[pstuifzand]

I have tested this with 0.8.15.

• Dragging text to the whiteboard does not create an iframe anymore.
• Copy paste of the same text DOES create an iframe.

[sprocketc]

Handled here #8753