More Search Bars

Compat with Essentials mod

• This commit addresses formatting issues with the Multiplayer search bar when mods such as Essentials mod is installed on mc-1.21.11
• Detects collisions with tab widgets and moves the search field beneath them
• Repositions/resizes the server list accordingly
• Rechecks layout after initialization, resizing, and during ticks
• Removes duplicate search-widget registration