Internationalise Branches page

Resources

FE @winh

Internationalise Project Activity Page

As part of our on-going effort to internationalise GitLab in #4012 (moved)

List of areas to translate

• Text label "Protected branches be can be managed..."
• Filter input placeholder text
• Dropdown
• Delete merged branches button
• New branch button
• protected label
• merged label
• Merge request button
• Compare button
• Download button widget
• Delete button alert confirmation content
• Pagination widget (should already be done by other work, assuming it's re-used)