fix(vue-app): scroll to top on route changes only

[beornf]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

This change fixes the default scroll behavior by only scrolling to the top of page when the route changes.
Resolves #8553.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-io]

Codecov Report

Merging #8557 (2b8414a) into dev (e9650c7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #8557   +/-   ##
=======================================
  Coverage   67.53%   67.53%           
=======================================
  Files          91       91           
  Lines        3909     3909           
  Branches     1080     1080           
=======================================
  Hits         2640     2640           
  Misses       1021     1021           
  Partials      248      248           

Flag	Coverage Δ
unittests	67.53% <ø> (ø)

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[pi0]

Thanks!