bug: fix search scrolling with wider Unicode characters.

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

This should help make search scrolling more reliable larger Unicode characters like CJK/flag characters.

Issue

If applicable, what issue does this address?

Closes: #882

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov-commenter]

Codecov Report

Base: 19.64% // Head: 20.76% // Increases project coverage by +1.11% 🎉

Coverage data is based on head (8b6a336) compared to base (efcf2bd).
Patch coverage: 57.09% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #938      +/-   ##
==========================================
+ Coverage   19.64%   20.76%   +1.11%     
==========================================
  Files          75       75              
  Lines       14558    14576      +18     
==========================================
+ Hits         2860     3026     +166     
+ Misses      11698    11550     -148     

Impacted Files	Coverage Δ
src/app.rs	0.00% <0.00%> (ø)
src/app/query.rs	0.00% <0.00%> (ø)
src/canvas/drawing_utils.rs	100.00% <ø> (+25.00%)	⬆️
src/canvas/widgets/process_table.rs	0.00% <0.00%> (ø)
src/components/data_table/state.rs	33.33% <0.00%> (+0.98%)	⬆️
src/widgets/process_table.rs	14.02% <0.00%> (+1.01%)	⬆️
src/app/states.rs	54.57% <81.25%> (+54.57%)	⬆️
src/utils/gen_util.rs	87.39% <93.33%> (+0.23%)	⬆️
... and 1 more

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.