Fix checkbox label alignment in webform

Problem: In the lb_webform module, checkbox elements in some forms have misaligned labels. Specifically, labels appear below the checkboxes instead of next to them, and the layout becomes inconsistent, especially when displayed in multiple columns.

Expected behavior: Each checkbox should have its label placed next to it (typically to the right), and all checkboxes should be aligned consistently in a single or multi-column layout.

Before:

After: