fix ledger screensaver bug

[fedekunze]

Closes #2015

Description:

Thank you! 🚀

---

For contributor:

• Added entries in CHANGELOG.md with issue # and GitHub username
• Reviewed Files changed in the github PR explorer
• Attach screenshots of the UI components on the PR description (if applicable)
• Scope of work approved for big PRs

For reviewer:

• Manually tested the changes on the UI

[codecov]

Codecov Report

Merging #2106 into develop will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop    #2106      +/-   ##
===========================================
+ Coverage    95.46%   95.46%   +<.01%     
===========================================
  Files          110      110              
  Lines         2578     2579       +1     
  Branches       103      103              
===========================================
+ Hits          2461     2462       +1     
  Misses         108      108              
  Partials         9        9

Impacted Files	Coverage Δ
app/src/renderer/vuex/modules/ledger.js	100% <100%> (ø)	⬆️

[faboweb]

tested