theme: Fix wrong variable in contextMenuItemText color field

Fix some wrong color variables that were
assigned to the contextMenuItemText field.

Author: fombalang

lib/widgets/theme.dart

@@ -349,7 +349,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
       contextMenuItemBg: contextMenuItemBg ?? this.contextMenuItemBg,
       contextMenuItemLabel: contextMenuItemLabel ?? this.contextMenuItemLabel,
       contextMenuItemMeta: contextMenuItemMeta ?? this.contextMenuItemMeta,
-      contextMenuItemText: contextMenuItemText ?? this.contextMenuItemBg,
+      contextMenuItemText: contextMenuItemText ?? this.contextMenuItemText,
       editorButtonPressedBg: editorButtonPressedBg ?? this.editorButtonPressedBg,
       foreground: foreground ?? this.foreground,
       icon: icon ?? this.icon,
@@ -396,7 +396,7 @@ class DesignVariables extends ThemeExtension<DesignVariables> {
       contextMenuItemBg: Color.lerp(contextMenuItemBg, other.contextMenuItemBg, t)!,
       contextMenuItemLabel: Color.lerp(contextMenuItemLabel, other.contextMenuItemLabel, t)!,
       contextMenuItemMeta: Color.lerp(contextMenuItemMeta, other.contextMenuItemMeta, t)!,
-      contextMenuItemText: Color.lerp(contextMenuItemText, other.contextMenuItemBg, t)!,
+      contextMenuItemText: Color.lerp(contextMenuItemText, other.contextMenuItemText, t)!,
       editorButtonPressedBg: Color.lerp(editorButtonPressedBg, other.editorButtonPressedBg, t)!,
       foreground: Color.lerp(foreground, other.foreground, t)!,
       icon: Color.lerp(icon, other.icon, t)!,