Improved Exception Dialog with Copy Paste

[shivansh02]

Description

Exception dialog improvements: -better UI -copy paste functionality -detailed error with system information -report to github functionality

Related Issue

Fixes #1861

Motivation and Context

Exception Dialog currently has bad UI and no copy paste functionality.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have read the CONTRIBUTING guide.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

I provide my contribution under the terms of the license of this repository and I affirm the Developer Certificate of Origin.

[diivi]

I suppose .github/ISSUE_TEMPLATE/bug_report.md and .github/ISSUE_TEMPLATE/bug_form.yaml will also need to be changed as a part of this. Will let the maintainers decide.

[shivansh02]

@m3nu @ThomasWaldmann Can you please take a look?

[real-yfprojects]

I suppose .github/ISSUE_TEMPLATE/bug_report.md and .github/ISSUE_TEMPLATE/bug_form.yaml will also need to be changed as a part of this.

This can be done once this is merged.

[m3nu]

Needs rebase and an icon from the sources we usually use https://vorta.borgbase.com/contributing/#icons

[shivansh02]

Needs rebase and an icon from the sources we usually use https://vorta.borgbase.com/contributing/#icons

@m3nu Done, and the checks are passing as well. Can we merge this?