Improved Island Top & 1.15.X & More

Island Top Improvements

• Island Top header message (Toggleable & Configurable)
• Island Top header bar message (Toggableable & Configurable)
• /is calc command to force refresh your own island.

Other

• Use proper logger in enable message for PlaceholderAPI
• PlaceholderAPIIntegration avoid shadowing name.
• Void Teleport check fixed.
• Better wording for page navigation
• Set prefix for commands internally Just in case :D
• Remove obvious information from command help.