v1.9050 - Support ImageGlass 9.0 beta 5

Breaking change:

• Supports ImageGlass beta 5 (v9.0.5.0) or later
• Passes an param with unique key to external tool for IPC connection: https://github.com/ImageGlass/ImageGlass.Tools/blob/8c1ad1c0648008da835ef36625df747242c3cc19/Source/ImageGlass.Tools/ImageGlassTool.cs#L144-L160

Nuget: https://www.nuget.org/packages/ImageGlass.Tools

• Fixed an issue where the second ImageGlass instance cannot open the external tool if other instances already open it
• Added support for setting topmost state of tool window according to ImageGlass window

Full Changelog: 1.9040.0.0...1.9050.0.0