Tick checkbox html symbol

Here are some useful tickbox characters:

☐ (0x2610 in Unicode hexadecimal [HTML decimal: ☐]): an empty (unchecked) checkbox
☑ (0x2611 [HTML decimal: ☑]): the checked version of the previous checkbox
✓ (0x2713 [HTML decimal: ✓])
✔ (0x2714 [HTML decimal: ✔])