UI bugs fixes after having merged the background image feature

[Onetchou]

Intersect arc & line icon is now displayed in the main window:

All the new icons are into the repo:

New icons are everywhere where they should be:

The operations toolbar is no more always greyed out:

[what-the-diff]

🎉 PR Summary 🎉

With this Pull Request (PR), we're making the interface of our application more user-friendly. Here's a quick rundown of the tweaks that you'll notice:

• Improved Accessibility! 🧑‍🦯 The 'operations_ToolBar' widget is now enabled, allowing all users to access it effortlessly.
• Navigation Simplified! 🪡 We've reset the 'tabWidget' widget to show its first page as you log in or load the app, which is incredibly user-friendly.
• Better Interface Aesthetics! 🎈 The 'points_Page' widget positioning has been refined to a more appropriate location for an improved visual experience.
• Added More Clarity with Icons! 🎯 A new icon has been added to the 'points_PushButton' widget, providing a quick visual indication of what the button does.
• Design Enhancements! 📐 Several minor tweaks to widget heights and widths have been made, resulting in a superior and intuitive interface. This includes changes to 'points_Widget', 'operations_Widget', 'coordinatesWidget', 'garments_Widget', 'rules_Widget', 'export_Widget', 'calculationReportOptionsWidget', and 'calculationPreviewOptionsWidget'.

That's about it! These steps significantly improve user interactions with our application, ultimately elevating the overall user experience. Let's get excited for these enhancements! 🚀

👍 If there's any feedback on these changes, your suggestions are most welcome! We continually strive to make our users' experiences with our app seamless and enjoyable. Keep them coming! 🎊🎈

[Onetchou]

Fixes #1090
Fixes #1089

[DSCaskey]

Looks good to me.