Rework and improve dialog component

[mharis001]

When merged this pull request will:

• Make various improvements to the dialog component
• Refactor how content controls return their values
  • Rather keep track of the value as changes are made, controls define a QFUNC(value) function that returns their current value
  • Simplifies a lot of the control specific functions since a lot less handling is needed
• Use common base UI classes and display for the dialog
  • Fix scrollbar overlap with content controls when the content height is greater than the maximum
• Add _saveID parameter to create function specify a custom save ID
  • Needed when, for example, the title may change between dialog multiple openings of the dialog but the content remains the same
• Add _args parameter to initSliderEdit common function
• Fix initDisplayPositioning common function not setting the content's height when it is greater than the maximum
• Fix issue where the saved value was modified even though the dialog was cancelled for COLOR, OWNERS, and VECTOR control types
  • Saved value array was being modified by reference

Control specific changes:

• COLOR
  • Changed the color preview to be bigger
  • Changed to use common initSliderEdit for the UI handling
• COMBO / LIST
  • Added option to sort entries alphabetically
  • LIST now uses COMBO's function since handling is identical other than setting the list height
• OWNERS
  • Moved UI to common so it can be used by other components
  • Added initOwnersControl common function to setup its handling
  • Added buttons to (un-)check all groups/players, Close Select all / deselect all options for the Teleporter module #335
• SIDES
  • Changed to use common sides control
  • Added ability to have multi-select sides controls, specified by an array of sides as the default value
• SLIDER
  • Changed to use common initSliderEdit for the UI handling

[CreepPork]

Any documentation changes?

[mharis001]

Will update documentation in another PR.