Remove error style from FindAndReplace and GoToLine dialogs when they contain no input text (Fixes #220)

Author: WebCoder49

plugins/find-and-replace.js

@@ -123,6 +123,9 @@ codeInput.plugins.FindAndReplace = class extends codeInput.Plugin {
                         // No matches - error
                         dialog.findInput.classList.add('code-input_find-and-replace_error');
                     }
+                } else {
+                    // Input box is empty - no error
+                    dialog.findInput.classList.remove('code-input_find-and-replace_error');
                 }
                 this.updateMatchDescription(dialog);
             }

plugins/go-to-line.js

@@ -81,8 +81,9 @@ codeInput.plugins.GoToLine = class extends codeInput.Plugin {
                 }
             }
         } else {
-            // No value
+            // No value, so no message or error
             dialog.guidance.textContent = "";
+            dialog.input.classList.remove('code-input_go-to-line_error');
         }
 
         if (event.key == 'Enter') {