Set a default column value when setting a colspan on a widget

Using grid, assuming your goal is to make a widget take the whole width of a layout

Select a widget
Set a colspan => widget is moved to the right side of the screen

When this happens, people have no clue how to deal with the situation and need hints to understand that a column number has to be set.

Suggested solution:

• When no value is set in the column number and users sets a value for colspan, set the column number value to 1 by default