Distorted widgets in demo, when one column layout is selected.

### Issue type

**I'm submitting a ...** (check one with "x")

* [x] bug report
* [ ] feature request
* [ ] question about the decisions made in the repository

### Issue description

**Current behavior:**
Switching between layouts distorts some component sizes/positions. Happens only on switching layouts, not visiting page from another place.

**Expected behavior:**
Components only resized, but not overlapping, and not changing positions.

**Steps to reproduce:**
In _E-commerce_ page, try to select one column layout:

In _IOT dashboard_, also one column layout, button goes out of widget:

That happens regardless theme selected.

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