Added Pointer on Hover for Completed Items Icon

[MohitNamdev22]

Related Issues

Closes #271

Short Description and Why It's Useful

I gave a hover cursor pointer to visibility button in Purchase Order, now its easier for user visibility

Screenshots of Visual Changes before/after (If There Are Any)

IMPORTANT NOTICE - Remember to add changelog entry

Contribution and Currently Important Rules Acceptance

• [x] I read and followed contribution rules

[ymaheshwari1]

Closing as handled in #286