Update main.js

[r0cketdyne]

Here's why I made the changes:

Variable Destructuring: Destructuring imports from imports.gi and imports.common improve code readability by directly accessing the required components.

Arrow Functions: Arrow functions are used for concise and clearer syntax, especially for callback functions.

Consistent Indentation: Ensuring consistent indentation improves code readability and maintainability.

Conditional Simplification: Simplifying conditional statements where possible reduces code complexity and enhances readability.

Removed Redundant Comments: Removed comments that didn't add any significant value to the code or were self-explanatory.

Consistent Formatting: Ensuring consistent formatting throughout the codebase makes it easier to read and maintain.