po: fix duplicate strings, update POT file

[kbdharun]

Description

Some strings such Browse Files and Journal Browser have duplicate entries Browse files and Journal browser in source files causing string failure alerts on Weblate. This PR fixes it and also updates the POT file alone using the following commands:

meson setup /tmp/translation-build
meson compile -C /tmp/translation-build bottles-pot

I intentionally haven't touched the PO Files to avoid conflicts with #2883, I would suggest using Weblate's addon to sync PO Files with POT Files automatically. (Will DM the details to mirkob)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

[github-actions]

Pylint result on modfied files:

[fab-sonarqube]

SonarQube Quality Gate

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information