Trim whitespace from search results

[camc314]

After:

[codecov-commenter]

Codecov Report

Merging #1453 (61c2ce9) into master (7c993f9) will decrease coverage by 0.05%.
The diff coverage is 0.00%.

❗ Current head 61c2ce9 differs from pull request most recent head 60f2686. Consider uploading reports for the commit 60f2686 to get more accurate results

@@            Coverage Diff            @@
##           master   #1453      +/-   ##
=========================================
- Coverage    6.10%   6.04%   -0.06%     
=========================================
  Files         123     124       +1     
  Lines       49822   50878    +1056     
=========================================
+ Hits         3041    3077      +36     
- Misses      46781   47801    +1020     

Impacted Files	Coverage Δ
lapce-data/src/config.rs	0.00% <0.00%> (ø)
lapce-ui/src/search.rs	0.00% <0.00%> (ø)
lapce-core/src/buffer/mod.rs	63.06% <0.00%> (-0.21%)	⬇️
lapce-proxy/src/lib.rs	0.69% <0.00%> (-0.03%)	⬇️
lapce-ui/src/app.rs	0.00% <0.00%> (ø)
lapce-ui/src/tab.rs	0.00% <0.00%> (ø)
lapce-ui/src/find.rs	0.00% <0.00%> (ø)
lapce-ui/src/list.rs	0.00% <0.00%> (ø)
lapce-rpc/src/core.rs	0.00% <0.00%> (ø)
lapce-ui/src/hover.rs	0.00% <0.00%> (ø)
... and 28 more

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[dzhou121]

The matching hightlight isn't correct any more.

Also I think it's best to be an option.

[camc314]

Thanks for reviewing! I've added a config setting for it + fixed the highlighting

[camc314]