Trim file path settings fields prior to save

[droidmonkey]

• Fixes Path for SSH_AUTH_SOCK not trimmed for spaces #11630

Type of change

• ✅ Bug fix (non-breaking change that fixes an issue)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 63.95%. Comparing base (17dc022) to head (6156400).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/sshagent/AgentSettingsWidget.cpp	0.00%	2 Missing ⚠️
src/browser/BrowserSettingsWidget.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #11633      +/-   ##
===========================================
- Coverage    63.95%   63.95%   -0.00%     
===========================================
  Files          364      364              
  Lines        38309    38309              
===========================================
- Hits         24498    24497       -1     
- Misses       13811    13812       +1     

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