New logo, updated supportedbuilds, updated plugins

General: New logo images, new XBDM button images, updated upper left XAML logo on home page and dialogs.
Supportedbuilds: H3 Mythic build added, H4 TU3 build added, some stringid modifiers in similar builds.
Plugins: Various H4 plugin changes, redundant stringid workaround lines removed from objects where found, and raw lines removed from Reach objects.