Player mobile improvements (#3120)

* Add videojs-mobile-ui
* Prevent marker wrapping and fix alignment
* Fix marker update on delete
* Change hotkey modifier behaviour
* Update KeyboardShortcuts.md

ui/v2.5/src/docs/en/Changelog/v0180.md

@@ -13,6 +13,8 @@
 * Added tag description filter criterion. ([#3011](https://github.com/stashapp/stash/pull/3011))
 
 ### 🎨 Improvements
+* Jump back/forward buttons on mobile have been replaced with double-tap gestures on mobile. ([#3120](https://github.com/stashapp/stash/pull/3120))
+* Added shift- and ctrl-keybinds for seeking for shorter and longer intervals, respectively. ([#3120](https://github.com/stashapp/stash/pull/3120))
 * Added Estonian and Russian Language translations. Added in-progress Languages for Persian, Ukrainian, Bengali, Thai, Romainian, Hungarian, and Czech.([#3024] (https://github.com/stashapp/stash/pull/3024))
 * Also show imperial units for performer height and weight. ([#3097](https://github.com/stashapp/stash/pull/3097))
 * Limit number of items in selector drop-downs to 200. ([#3062](https://github.com/stashapp/stash/pull/3062))

ui/v2.5/src/docs/en/Manual/KeyboardShortcuts.md

@@ -64,6 +64,12 @@
 | `p n` | Play next scene in queue |
 | `p p` | Play previous scene in queue |
 | `p r` | Play random scene in queue |
+| `←` | Seek backwards by 10 seconds |
+| `→` | Seek forwards by 10 seconds |
+| `Shift + ←` | Seek backwards by 5 seconds |
+| `Shift + →` | Seek forwards by 5 seconds |
+| `Ctrl/Alt + ←` | Seek backwards by 1 minute |
+| `Ctrl/Alt + →` | Seek forwards by 1 minute |
 | `{1-9}` | Seek to 10-90% duration |
 | `[` | Scrub backwards 10% duration |
 | `]` | Scrub forwards 10% duration |