Improvements and thoughts for 3.0

[dy]

• Balance effects - now they are too different.
• Add some more effects, especially with body content shift, or modal content delay.
• Work on overlay styles. Minimal ideas - moire, blur.
• Mobile minor bugs, like questionable margin-top where there should be centered alignment.
• Elaborate and add types. Dialog, confirm, notifier at least.
• Drag-resize is quite crappy now. It should be flawless.
• Leave placing logic for dropdowns/popups only, manage modals with css. As it is done in vex.
• Add main content displacements, in conjunction with effects.
• Make animation class, removing messiness of effects.
• Stacked placement? Like notifiers, vex, etc.
• Enable single option

Or possibly fuck it? If user needs special purpose popup - it is way better to create it from scratch, like drag/resize, windows, etc. This repo is really for prototype-quelity popups, just to up and run.