Steps to Reproduce:
1. On 7.0.x portal:
1.1 Go to Content -> Form -> Add a new form
1.2 Add two text fields.
1.3 Resize both fields so that they are 50% of the original length;
1.4 Try to move field 2 above field 1.
1.5 Save form
2. Upgrade the 7.0.x database to 7.2.x/Master;
3. Launch the 7.2.x/Master portal;
4. Go to Content & Data > Forms -> "Test Forms";
Both fields are placed in the same column but in different rows
Both fields become one