Fix context menu caret behavior when right-clicking inside a selection

[saberoueslati]

Fixes #780

The editor context menu had inconsistent behavior; this meant right-clicking outside a selection with the intent to act on that location would still operate on wherever the caret happened to be.

Change

MainWindow.cpp — In the customContextMenuRequested handler inside addEditor, a call to selectionFromPoint now checks whether the right-click landed inside an existing selection. If it did, the selection and caret are left untouched. If it did not, setEmptySelection is called to move the caret to the clicked position, matching standard editor behavior.

Behavior

• Right-clicking inside a selection preserves the selection; context menu actions operate on the selected text
• Right-clicking outside a selection clears it and moves the caret to the clicked position
• URL detection (Copy URL) is unaffected — contextMenuPos is still set before the check
• No new settings, files, or API changes

Manual test after the fix :

Screencast.from.2026-06-07.23-28-54.webm

[dail8859]

Thanks! I was not aware Scintilla had the selectionFromPoint() API but that's exactly what is needed.

[saberoueslati]

Glad to help @dail8859, while you are at it, can you please review this PR #1045 ?

Thank you