Type improvements to landing.py and panel.py

[VasigaranAndAngel]

Summary

• few type improvements to both landing.py and panel.py
• renamed a method in the PanelModal class (in panel.py) and updated all references in other files

Tasks Completed

• Platforms Tested:
  • Windows x86
  • Windows ARM
  • macOS x86
  • macOS ARM
  • Linux x86
  • Linux ARM
• Tested For:
  • Basic functionality
  • PyInstaller executable

[Computerdores]

Note: I the comments I added aren't issues with what you did, but issues with the code you touched that might as well be fixed now while the code is being changed anyways

[Computerdores]

I am sorry if this was unclear, but what I intended to say was that both the title and the window title could be moved to the constructor.
Unless it was clear enough and you didn't do it for another reason?

[VasigaranAndAngel]

I am sorry if this was unclear, but what I intended to say was that both the title and the window title could be moved to the constructor. Unless it was clear enough and you didn't do it for another reason?

I changed the code to pass the title to the constructor as you suggested. since the set_title method was no longer used elsewhere and seemed unnecessary, i removed it. i don't see a need to change the title after creating a panel window, and if it's requred, the title_widget can still be accessed directly. that's why i removed it.