Resolve some input focus issues for the debugger.

runtime/observatory/lib/src/elements/debugger.dart

Index: runtime/observatory/lib/src/elements/debugger.dart
diff --git a/runtime/observatory/lib/src/elements/debugger.dart b/runtime/observatory/lib/src/elements/debugger.dart
index ae0ab6f24b11cfa5ff6361146561e87ac4b37a39..b4709c9c44cda311e7241563e2886d67f2f60d7a 100644
--- a/runtime/observatory/lib/src/elements/debugger.dart
+++ b/runtime/observatory/lib/src/elements/debugger.dart
@@ -1484,7 +1484,8 @@ class DebuggerPageElement extends ObservatoryElement {
       // Random clicks should focus on the text box.  If the user selects
       // a range, don't interfere.
       var selection = window.getSelection();
-      if (selection == null || selection.type == 'Caret') {
+      if (selection == null ||
+          (selection.type != 'Range' && selection.type != 'text')) {
         debugger.input.focus();
       }
     });