assign existing tag on timesheet import (#1877)

[synaestic]

Description

Fix for "Import timesheets using console fails to process tags #1877"

Types of changes

• 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 change)

Checklist

• I verified that my code applies to the guidelines (composer code-check)
• I updated the documentation (see here)
• I agree that this code is used in Kimai and will be published under the MIT license

[codecov]

Codecov Report

Merging #1883 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1883      +/-   ##
============================================
+ Coverage     92.89%   92.92%   +0.03%     
  Complexity     5206     5206              
============================================
  Files           490      490              
  Lines         16111    16111              
============================================
+ Hits          14966    14971       +5     
+ Misses         1145     1140       -5     

Impacted Files	Coverage Δ	Complexity Δ
src/Controller/ProjectController.php	91.47% <0.00%> (+2.24%)	55.00% <0.00%> (ø%)

[kevinpapst]

Thanks for taking the time @synaestic 👍 can you please have a look at that one comment of mine

[kevinpapst]

Thanks for your contribution @synaestic

Every help is always very welcome 😁