Dev/config presets issue 8

[Dexus]

This pull request introduces a new feature for managing configuration presets, along with several UI and style improvements. The most important changes include adding preset management functionality, updating the UI to support the new feature, and making various style adjustments to enhance the user interface.

Preset Management Functionality - fixes #8 :

• Added functions loadPresets, savePreset, and deletePreset in main.js to handle preset operations.
• Introduced IPC handlers for loading, saving, and deleting presets in main.js.
• Implemented preset management UI components and logic in main/index.html, including buttons and modal dialogs for saving, loading, and deleting presets. [1] [2]

UI and Style Improvements:

• Updated main/index.html to exclude certain elements from event listeners to prevent conflicts with the new preset functionality. [1] [2] [3]
• Made various style adjustments in main/style.css to improve the layout and appearance of the application, including changes to the sidebar, buttons, dropdowns, and table headers. [1] [2] [3] [4] [5] [6] [7] [8] [9]

Other Changes:

• Adjusted the mutation rate input range in main/index.html to allow for a wider range of values.
• Commented out unused code related to the imports element in main/index.html.
• Added additional structure to the partstools and sheetdialog sections in main/index.html for better layout consistency.