* d2ui/tooltip: Make it invisible by default
* d2ui/button: Add GetToggled() method
* d2player/HUD: Add tooltip for minipanel button
* d2ui/button: Add disabled frame to minipanel buttons
* d2ui/widget_group: Add SetEnable method for clickable widgets
* d2player/mini_panel: move menu button here from HUD
* d2ui/button: toggled buttons take preference over disabled buttons
* d2player/help_overlay: Make panel only use widgets
* d2player/hud: Group most widgets into widget group
* d2ui/custom_widget: Allow tooltip to be attached
* d2player/hud: Attach staminaBar tooltip to staminaBar
* d2player/hud: Attach experienceBar tooltip to experienceBar widget
* d2ui/ui_manager: Always draw tooltips last
* d2player/help_overlay: It should be drawn over the HUD
* d2player/globeWidget: Move tooltip here from HUD
* d2core/tooltip: Automatically add tooltips to the uiManager
* d2core/ui_manager: Remove special handling of widgetGroups for rendering
* d2player/help_overlay: Add button to widget group
* d2player/hud: Attack runwalk tooltip to button
* d2player/mini_panel: Add panelButton to its own widget group
* d2core/widget_group: When a clickable is added, it's also added to uiManager
* d2player/globeWidget: make tooltip un/lock on click
* d2player/hud: Add runbutton to widget group
* d2player/mini_panel: Add group for tooltips
this allows us to move the tooltip with the panelbuttons. They can't be
in the general panelGroup as they would all become visible when the
panel is opened.
* d2core/button: Remove debug log when a button with tooltip is hovered
* d2ui/skilltree: Don't render availSPLabel
this is handled by the ui_manager now.
* d2ui/custom_widget: Allow them to be cached into static images
* d2player/hero_stats_panel: Remove render() function from game_controls
all ui elements are now grouped into a WidgetGroup, thus rendering is
done by the ui manager.
* d2player/hero_stats_panel: Remove unnecessary widgets from struct
we don't need to store them in the HeroStatsPanel struct anymore as they
are completly handled by the uiManager.
* d2ui/widget_group: Remove priority member
this is already defined by the BaseWidget.
* d2ui/widget: Move uiManager.contains() to the baseWidgets
this method makes more sense on a widget anyways.
* d2ui/widget: Add methods to handle widget hovering
* d2ui/custom_widget: Require define width/height
since the custom render() method can do whatever, we need the user to specify
the width/height such that GetSize() calls are meaningful.
* d2ui/widget: Allow widgets to return the uiManager
* d2player/HUD: Refactor health/mana globe into its own widget
* d2player/hud: Refactor load()
seperate each type of loading into its own method.
* d2player/HUD: Move stamina/exp bar into widgets
* d2player/HUD: Refactor left/right skills into widget
* d2ui/custom_widget: cached custom widgets should use widget.x/y
since we render to an image, we use widget.x/y to position the cached
image.
* d2player/HUD: User cached custom widget for all static images
