Added shortcuts to docs

docs/Keyboard Shortcuts.md

@@ -1,10 +1,18 @@
+### About
+
+The following keys and shortcuts can be used in Lychee. Single char-shortcuts are also working, when using them with together the `ctrl`-key.
+
 ### Everywhere
 | Key | Action |
 |:-----------|:------------|
 | `u` | Upload photo |
 | `enter` | Confirm Dialog |
-| `esc` | Close/Back |
-| `cmd`+`up` | Close/Back |
+| `esc` or `cmd`+`up` | Close/Back |
+
+### Albums
+| Key | Action |
+|:-----------|:------------|
+| `s` or `f` | Search |
 
 ### Album
 | Key | Action |
@@ -21,7 +29,7 @@
 | `r` | Set title |
 | `t` | Set tags |
 | `d` | Set description |
-| `s` | Star photo |
+| `s` or `f` | Star photo |
 | `i` | Show information |
 | `left` | Previous photo |
 | `right` | Next photo |