Icon update followup

[manongjohn]

This is a minor followup to icon refactoring PR #1183 to do the following

• Switches the last 2 parameters on createToolOptionsAction() to match the other create action functions.
  • This way the 1st 4 parameters matches OT and the remaining parameter is specific to T2D like the other functions.
• Fixes a Linux/macOS issue in which some menu icons (i.e. fx node context menus) were still visible despite Show Menu Icons was not enabled.
  • Extended the logic that creates blank icons for Windows build to also work for Linux/macOS builds.