Fix relation tags handling

[HarelM]

This moves all the logic of tags to icon handling to one place and reduce the duplication that was there from previous code.
Hopefully, this will make the coverage happy.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 3 lines in your changes missing coverage. Please review.

Project coverage is 91.81%. Comparing base (c991735) to head (a2e288e).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...a/il/org/osm/israelhiking/PlanetSearchProfile.java	66.66%	0 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #14      +/-   ##
============================================
+ Coverage     89.08%   91.81%   +2.73%     
+ Complexity      153      149       -4     
============================================
  Files             8        8              
  Lines           522      501      -21     
  Branches         86       79       -7     
============================================
- Hits            465      460       -5     
+ Misses           39       23      -16     
  Partials         18       18              

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