Allways show tracks without timestamps

[tacruc]

fixes #738

[tacruc]

@nougatbyte could you test this?

[codecov-commenter]

Codecov Report

Merging #739 (4933abb) into master (c51b083) will increase coverage by 0.22%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #739      +/-   ##
============================================
+ Coverage     58.31%   58.54%   +0.22%     
  Complexity     1138     1138              
============================================
  Files            42       42              
  Lines          3481     3483       +2     
============================================
+ Hits           2030     2039       +9     
+ Misses         1451     1444       -7     

Flag	Coverage Δ
unittests	58.54% <ø> (+0.22%)	⬆️

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Impacted Files	Coverage Δ
nextcloud/apps/maps/lib/Helper/ExifGeoData.php	75.73% <0.00%> (+5.58%)	⬆️

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[tacruc]

See #738