Add aria lables to more option button in sidebar

[Antony007]

Summary

Add aria labels to 'More option' button in sidebar

Changes

• Add aria>label data to toolbutton struct when creating more option button for Panel
• Removed alt attribute from Tool Button since buttons don't support alt attribute
• Added condition to set alt for button image from aria>label, if present

Commit Info

Change-Id: Ic608ee29891154e0f46523a1f5b1e5c249c54c6a

• Target version: master

Checklist

• [x] Code is properly formatted
• [x] All commits have Change-Id
• [ ] I have run tests with make check
• [x] I have issued make run and manually verified that everything looks okay
• [ ] Documentation (manuals or wiki) has been updated or is not required