Removed primary class from Add Query button, and changed name of Panel Options tab o General Options

(cherry picked from commit bf826d7c81)

public/app/features/dashboard/panel_editor/GeneralTab.tsx

@@ -44,7 +44,7 @@ export class GeneralTab extends PureComponent<Props> {
 
   render() {
     return (
-      <EditorTabBody heading="Panel Options" toolbarItems={[]}>
+      <EditorTabBody heading="General" toolbarItems={[]}>
         <div ref={element => (this.element = element)} />
       </EditorTabBody>
     );

public/app/features/dashboard/panel_editor/PanelEditor.tsx

@@ -45,7 +45,7 @@ interface PanelEditorTab {
 const panelEditorTabTexts = {
   [PanelEditorTabIds.Queries]: 'Queries',
   [PanelEditorTabIds.Visualization]: 'Visualization',
-  [PanelEditorTabIds.Advanced]: 'Panel Options',
+  [PanelEditorTabIds.Advanced]: 'General',
   [PanelEditorTabIds.Alert]: 'Alert',
 };
 

public/app/features/dashboard/panel_editor/QueriesTab.tsx

@@ -135,7 +135,7 @@ export class QueriesTab extends PureComponent<Props, State> {
         <DataSourcePicker datasources={this.datasources} onChange={this.onChangeDataSource} current={currentDS} />
         <div className="flex-grow-1" />
         {!isAddingMixed && (
-          <button className="btn navbar-button navbar-button--primary" onClick={this.onAddQueryClick}>
+          <button className="btn navbar-button" onClick={this.onAddQueryClick}>
             Add Query
           </button>
         )}