BUG: fix arc tooltips

[DSCaskey]

This PR:

• Fixes the issue of the status bar tooltips for the Arc - Radius and Angles and the Arc - Elliptical tools disappearing.

• Continues the process of code style changes for clarity and uniformity.

closes issue #1584

[what-the-diff]

PR Summary

• Header Comments Update
  Updated header comments for current year and authorship in dialogarc.h and dialogellipticalarc.h
• Method Names Standardized
  Method naming consistency established in dialogarc.h and dialogellipticalarc.h
• Improved Variable Names
  Understandability and consistency of member variable names heightened in dialogarc.h and dialogellipticalarc.h
• Code Cleanup
  Removed unnecessary comments and enhanced code readability in header files
• UI Button Names Standardization
  Updated button names for consistency in dialogellipticalarc.ui
• Code Streamlining
  Removed unused emit in dialogtool.cpp for more efficient code

[slspencer]

Please update valentina zhuravaska's contributions to 2016, not 2013.

[DSCaskey]

Hey @csett86,

Any idea why the Windows builds are failing here? The PR built last week and all I did here was change some dates. The develop & feature branch ci.yml's look the same, and the CI Chrono built yesterday.

[csett86]

I compared this one and yesterdays CI build https://github.com/FashionFreedom/Seamly2D/actions/runs/27112316939/job/80012441891, and its the update to VS2026 mentioned in actions/runner-images#14017

I'll raise a separate PR to fix that by pinning to windows-2022 as mentioned in actions/runner-images#14017

[csett86]

@DSCaskey see #1586

[DSCaskey]

Thanks @csett86... it makes sense now.