feature: add current battery charging state, update field names

[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:

Adds an additional field to clarify the current charging state, and update one of the fields from consumption to rate. Also tweak some auto text hiding logic.

Issue

If applicable, what issue does this address?

Closes: #

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]

Codecov Report

Patch coverage has no change and project coverage change: -0.06 ⚠️

Comparison is base (3e1aa9c) 25.79% compared to head (988d740) 25.74%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1106      +/-   ##
==========================================
- Coverage   25.79%   25.74%   -0.06%     
==========================================
  Files          94       94              
  Lines       15505    15540      +35     
==========================================
  Hits         4000     4000              
- Misses      11505    11540      +35     

Flag	Coverage Δ
macos-12	27.09% <0.00%> (-0.07%)	⬇️
ubuntu-latest	27.05% <0.00%> (-0.07%)	⬇️
windows-2019	27.10% <0.00%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/app/data_harvester/batteries/battery.rs	0.00% <0.00%> (ø)
src/canvas/widgets/battery_display.rs	0.00% <0.00%> (ø)
src/data_conversion.rs	14.54% <0.00%> (-0.31%)	⬇️

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