Update processor-box.html

Minor change to point out that middle click on a processor toggles the state.

Based on a response to a ticket from a user struggling to hit the exact area of the LED:
https://tracker.ardour.org/view.php?id=8622#c25640

diff --git a/include/processor-box.html b/include/processor-box.html
index 40fc3961c8a7a772698015ca8026e7e1f5dc1f88..9e9fe09d22f9008867e9b3535da501f2c07b049e 100644 (file)
--- a/include/processor-box.html
+++ b/include/processor-box.html
@@ -71,8 +71,9 @@
 </figure>
 
 <p>
-  To the left of the name of each processor is a small LED symbol; if this is lit-up, the processor is active. Clicking on it
-  will deactivate the processor and effectively bypass it.
+  To the left of the name of each processor is a small LED symbol; if this is lit-up, the processor is active. 
+  <kbd class=mouse>Left</kbd>-clicking on the LED symbol, or <kbd class=mouse>Middle</kbd>-clicking anywhere on the processor
+  will deactivate the processor and effectively bypass it. Click again to reactivate the processor.
 </p>
 
 <p class="note">