Add Tooltips, status bar hints, and Right-click/Help menu

[zxq82lm]

Contextual helps

• Tooltips: small info bubbles shown on hover/focus.
• Status bar hints: short messages displayed in the status bar when an action is possible or in progress.
• Right-click / Help menu: context menus or “What is this?” options that provide explanations specific to the selected element.
• Other contextual help?

List to establish

We first need to establish a list of contextual help items (tooltips, status bar hints, right-click help, etc.) that should be added to the editor.