Servo-Modquisitor-2 v1.0.0

• Added official secure connection to the Nexus account (OAuth). Thanks to the developers and Nexus support.
• Improved validation.
• Improved sorting.
• Reworked some button names and tooltips.
• Minor dialog unification.
• Slightly improved mod table.
• Added mod installation autofixes:
  • Pulsing Barrels: Packaging error - the main pulsing_barrels folder is added, and files and folders are placed there.
  • Hub Hotkeys: Incorrect hub_hotkey_menus folder name - removed unnecessary "-main".
• I drew a new program icon and replaced it.
• File refactoring:
  • Split the ui.go file into two: ui_build.go and ui_dialogs.go. ui.go itself has been removed.
  • Almost everything related to updates has been moved to the update.go file.
• Added new mods to the mod database.