Add keyboard shortcuts (#637)

* Add documentation
* Fix manual styling
* Add dialog for setting Movie images
* Mention manual in README

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

@@ -0,0 +1,155 @@
+# Keyboard Shortcuts
+
+## Global shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `?` | Display manual |
+
+### Global Navigation
+
+| Keyboard sequence | Target page |
+|-------------------|--------|
+| `g s` | Scenes |
+| `g v` | Movies |
+| `g k` | Markers |
+| `g l` | Galleries |
+| `g p` | Performers |
+| `g u` | Studios |
+| `g t` | Tags |
+| `g z` | Settings |
+
+## Query page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `/` | Focus search field |
+| `f` | Show Add Filter dialog |
+| `r` | Reshuffle if sorted by random |
+| `v g` | Set view to grid |
+| `v l` | Set view to list |
+| `v w` | Set view to wall |
+| `+` | Increase zoom slider |
+| `-` | Decrease zoom slider |
+| `←` | Previous page of results |
+| `→` | Next page of results |
+| `Shift + ←` | Go to current results page -10 |
+| `Shift + →` | Go to current results page +10 |
+| `Ctrl + Home` | Go to first page of results |
+| `Ctrl + End` | Go to last page of results |
+| `s a` | Select all on page |
+| `s n` | Unselect all |
+| `e` | Edit selected |
+| `d d` | Delete selected |
+
+## Scenes page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `p r` | Play random scene |
+
+## Scene page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `a` | Details tab |
+| `k` | Markers tab |
+| `f` | File info tab |
+| `e` | Edit tab |
+| `o` | Increment O-Counter |
+
+### Scene Markers tab shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `n` | Display Create Markers dialog |
+
+### Edit Scene tab shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `r {1-5}` | Set rating |
+| `r 0` | Unset rating |
+| `s s` | Save Scene |
+| `d d` | Delete Scene |
+| `Ctrl + v` | Paste Scene cover |
+
+[//]: # "Commented until implementation is dealt with"
+[//]: # "(| `l` | Focus Gallery selector |)"
+[//]: # "(| `u` | Focus Studio selector |)"
+[//]: # "(| `p` | Focus Performers selector |)"
+[//]: # "(| `v` | Focus Movies selector |)"
+[//]: # "(| `t` | Focus Tags selector |)"
+
+## Movies Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `n` | New Movie |
+
+## Movie Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `e` | Edit Movie |
+| `s s` | Save Movie |
+| `d d` | Delete Movie |
+| `r {1-5}` | Set rating (in edit mode) |
+| `r 0` | Unset rating (in edit mode) |
+| `Ctrl + v` | Paste Movie image |
+
+[//]: # "Commented until implementation is dealt with"
+[//]: # "(| `u` | Focus Studio selector (in edit mode) |)"
+
+## Markers Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `p r` | Play random marker |
+
+## Performers Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `n` | New Performer |
+| `p r` | Open random Performer |
+
+## Performer Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `a` | Details tab |
+| `c` | Scenes tab |
+| `e` | Edit tab |
+| `o` | Operations tab |
+| `f` | Toggle favourite |
+
+### Edit Performer tab shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `s s` | Save Performer |
+| `d d` | Delete Performer |
+| `Ctrl + v` | Paste Performer image |
+
+## Studios Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `n` | New Studio |
+
+## Studio Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `e` | Edit Studio |
+| `s s` | Save Studio |
+| `d d` | Delete Studio |
+| `Ctrl + v` | Paste Studio image |
+
+## Tags Page shortcuts
+
+| Keyboard sequence | Action |
+|-------------------|--------|
+| `n` | New Tag |
+