feat: ctrl scroll modifier

Use the `ctrl` button to scroll by a factor of ten

README.md

@@ -105,8 +105,9 @@ In application controls, these, amongst many other settings, can be customized w
 | button| result|
 |--|--|
 | ```( tab )``` or ```( shift+tab )``` | Change panel, clicking on a panel also changes the selected panel.|
-| ```( ↑ ↓ )``` or ```( j k )``` or ```( PgUp PgDown )``` or ```( Home End )```| Change selected line in selected panel, mouse scroll also changes selected line.|
+| ```( ↑ ↓ )``` or ```( j k )``` or ```( PgUp PgDown )``` or ```( Home End )```| Scroll line in selected panel - mouse wheel will also scroll.|
 | ```( ← → )``` | When logs panel selected, scroll horizontally across the text of the logs.|
+| ```( ctrl )``` | Increase scroll speed, used in conjuction scroll keys.|
 | ```( enter )```| Run selected docker command.|
 | ```( 1-9 )``` | Sort containers by heading, clicking on headings also sorts the selected column. |
 | ```( 0 )``` | Stop sorting.|