lord acc4c7a13e d2ui refactor (#699) ... * fixed lint errors in button.go * fixed lint errors in checkbox.go * Removed d2ui singleton, fixed nearly all lint errors - Changed `UI` struct to `UIManager`, removed singleton - UI element provider functions are now methods of the UI Manager - Screens now use the UI manager to create UI elements - game panels in d2player now use the UI Manager to create UI elements - Only the UI manager knows about "widgets"; calls to `d2ui.AddWidget` in Screen instances have been removed * changed ui element provider methods from `Create` to `New`		2020-08-06 10:30:23 -04:00
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d2gamescreen	d2ui refactor (#699)	2020-08-06 10:30:23 -04:00
d2player	d2ui refactor (#699)	2020-08-06 10:30:23 -04:00