Component plans

### Nebular Components Plan

**Popover like components** @tibing
- [x] Popover
- [x] Context Menu
- [x] Hint
- [x] Modal/Popup/Dialog window
- [x] Collapsable (gmail new email like) window
- [x] Selectbox
- [x] Notification/Toaster
- [ ] Snack bar (?)
- [ ] Fabs (?)

**Layout**
- [x] Layout
- [x] Column
- [x] Header
- [x] Footer
- [x] Sidebar
- [x] Card
- [x] Flip Card
- [x] Reveal Card
- [x] Menu
- [x] Global Search
- [x] Tabs
- [x] Actions
- [ ] Search
- [x] Accordion
- [x] Infinite Scroll
- [ ] Splitter
- [ ] Collapse
- [ ] Breadcrumbs
- [ ] Grid
- [x] Stepper
- [x] List
- [ ] Sortable
- [ ] Draggable

**Forms**
- [x] Checkbox
- [ ] Form
- [x] Input
- [x] Button
- [x] Date select
- [ ] Time select
- [x] Calendar
- [x] Range
- [ ] Autocomplete
- [x] Radio
- [ ] Switch
- [ ] Label (?)

**Other**
- [x] Badge
- [x] User Avatar
- [x] Chat UI
- [x] Icon
- [ ] Slider
- [x] Spinner
- [x] Chips
- [x] Progress bar