load() allows overlapping widgets

[cca-developer]

Widgets should not be allowed to overlap

When calling load after items have been put in place, it will allow widgets to overlap each other.

Your environment

• gridstack 9.2.1
• Chrome/Windows

Steps to reproduce

https://jsfiddle.net/xc7540dt/2/
This differs from the baseline fiddle only in that it calls grid.load(items) at the end. But if you drag the widgets labeled 0 or 1, you can see that there is a duplicate behind them.

Expected behavior

The expectation is that widgets should never overlap each other.

[adumesny]

an easy fix for this example is to make sure widgets have id, but when loading a new layout it shouldn't overlap anyway.

[adumesny]

fixed in next release. don't forget to donate if you find this lib useful!

[adumesny]

this broke in v10.3.0 as part of this change. will need to fix it again and add it to the test suite...

SHA-1: ec3c7e4

• load() now creates in order

• changed code to create widgets in sorted order instead of reverse order (fixed collision code to handle that case to push down items during collision)

• updated two.html to force collision loading to test