[FIX] web_editor: remove non-connected nodes in applyColor command

Before this commit, the `applyColor` command returned non-connected nodes
(nodes with no parent) in some not well-defined situations, leading to a Warning
when `selection.addRange()` was called by `_processAndApplyColor` with
such non-connected node as argument.

This commit properly removes such non-connected nodes from the array returned
by `applyColor`.

closes odoo/odoo#118419

Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>

addons/web_editor/static/lib/odoo-editor/src/commands/commands.js

@@ -620,13 +620,15 @@ export const editorCommands = {
             return font;
         });
         // Color the selected <font>s and remove uncolored fonts.
-        for (const font of new Set(fonts)) {
+        const fontsSet = new Set(fonts);
+        for (const font of fontsSet) {
             colorElement(font, color, mode);
             if (!hasColor(font, mode) && !font.hasAttribute('style')) {
                 for (const child of [...font.childNodes]) {
                     font.parentNode.insertBefore(child, font);
                 }
                 font.parentNode.removeChild(font);
+                fontsSet.delete(font);
             }
         }
         restoreCursor();
@@ -638,7 +640,7 @@ export const editorCommands = {
             newSelection.removeAllRanges();
             newSelection.addRange(range);
         }
-        return fonts;
+        return [...fontsSet];
     },
     // Table
     insertTable: (editor, { rowNumber = 2, colNumber = 2 } = {}) => {