fixed export_qr_codes translation

[litvinovg]

What does this pull request do?

Fixes export_qr_code translation on hover of qr code image

How should this be tested?

For vitro, wilma, nemo, tenderfoot themes:

• Open person profile
• Click on qr code icon image
• Hover over enlarged qr code image
• Verify that Export qr code hint is shown

Interested parties

@chenejac