Fix issue where following a node and then selecting another feature would auto-center the feature (close #7820)

modules/modes/select.js

@@ -284,6 +284,8 @@ export function modeSelect(context, selectedIDs) {
 
             var loc = extent.center();
             context.map().centerEase(loc);
+            // we could enter the mode multiple times, so reset follow for next time
+            _follow = false;
         }