add <div.zoomable-image__margin/> to keep margin of the image on zooming
move setting `scrollLeft` and `scrollTop` of container from callback of
`setState` to `componentDidUpdate`
add 'hammerjs' package for touch gesture detection
rewrite `ZoomableImage` using 'hammerjs'
* Refactoring scss
introduce scss variables for the media modal
fix css block structure corresponding to react components
fix flex layouts
remove background image of the loaded image on the media modal
* Fix typo
* Improved media modal
ImageLoader: Impliment pinch zoom by CSS `transform: scale(X)`
ImageLoader: Impliment panning by CSS `overflow: scroll`
ImageLoader: Larger image
MediaModal: Larger close button
MediaModal: Close the modal by swiping vertically
MediaModal: Show/hide close button and right/left navigation on tapping image
MediaModal: Change the `pointer-event` CSS prpp to get more blank space to close the modal
ImageLoader: Zoom/reset zoom on double tap
MediaModal: disable vertical swiping while horizontally swiped
ImageLoader: prevent propagating touchmove event to MediaModal
MediaModal: Adjust size and potision of buttons
ImageLoader: Adjust scroll potision on pinch zoom
* Remove "swipe to close" and "double tap to zoom" features
* remove unused prop and functions
removed `onScroll` prop and `handleScroll` func in ImageLoader
* separate zoom functionary to ZoomableImage component
adjust styling of ImageLoader
add styling for ZoomableImage
* adjust size and potision of close button of media modal
* Fix for gif video
add `onClick` prop to ExtendedVideoPlayer
specify `onClick` prop to video tag for switching nav of `MediaModal`
add `.video-modal` class to scss to separate styling for `VideoModal`
* fix styling for centering
specify height of `ZoomableImage` by pixel
clean styling for `ImageLoader`
* fix lint errors
* small fix
* fixed designated parts
Yuto TokunagaandEugen Rochko