Wrong max/min values on ranges/sizes

[vicmeow]

Describe the bug
When the size unit is px, the max and min size values on range inputs are wrong.

To Reproduce
Steps to reproduce the behavior:

1. Go to box details
2. In width, click on % to switch to px
3. Max value is 100
4. See error.

Expected behavior
Max value should be the max value of the canvas, not just 100px.
And this applies not just to width, but to the height, x and y positions on box and shape.

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.