Add tooltips and UI improvements to toolbar

[zainabzaina]

This pull request improves the user interface by updating the toolbar setup:

• Added tooltips to buttons and fields
• Cleaned up layout and structure of the toolbar code
• Improved usability with clearer labels and grouping

This change aims to enhance the user experience when interacting with the toolbar elements.

[Colorjet3]

Is this the main menu toolbar or the timeline toolbar, or both? I am asking for testing purposes.