plugins: Add capability to dis-/enable them per buffer (#2836)

internal/buffer/settings.go

@@ -55,7 +55,26 @@ func (b *Buffer) SetOptionNative(option string, nativeValue interface{}) error {
 				buf.HighlightSearch = nativeValue.(bool)
 			}
 		}
-	}
+	} else {
+		for _, pl := range config.Plugins {
+			if option == pl.Name {
+				if nativeValue.(bool) {
+					if !pl.Loaded {
+						pl.Load()
+					}
+					_, err := pl.Call("init")
+					if err != nil && err != config.ErrNoSuchFunction {
+						screen.TermMessage(err)
+					}
+				} else if !nativeValue.(bool) && pl.Loaded {
+					_, err := pl.Call("deinit")
+					if err != nil && err != config.ErrNoSuchFunction {
+						screen.TermMessage(err)
+					}
+				}
+			}
+		}
+ 	}
 
 	if b.OptionCallback != nil {
 		b.OptionCallback(option, nativeValue)