Fix getComponentForEl with nested fragments (returns owner component)

[DylanPiercey]

Description

Currently require('marko/components').getComponentForEl will fail to return a component if there are nested fragments at play. This PR updates the logic to always return the owner component for an element which is simpler and typically what the user wants.

Checklist:

• I have read the CONTRIBUTING document and have signed (or will sign) the CLA.
• I have updated/added documentation affected by my changes.
• I have added tests to cover my changes.

[coveralls]

Coverage decreased (-0.002%) to 90.593% when pulling e2db223 on get-component-for-el-fix into c401b7f on master.

[codecov]

Codecov Report

Merging #1382 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1382      +/-   ##
==========================================
- Coverage   90.59%   90.59%   -0.01%     
==========================================
  Files         342      342              
  Lines       12494    12491       -3     
==========================================
- Hits        11319    11316       -3     
  Misses       1175     1175

Impacted Files	Coverage Δ
src/runtime/components/util-browser.js	98.57% <100%> (-0.06%)	⬇️

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