Sampath accessibility sev 2 2 (#1404)

* autoscale and manual radiobuutton fixes

* alt text attribute for images

* Revert "alt text attribute for images"

This reverts commit 5a660551c6.

* alt text for decorative images

* sev2 accessibilitydefects in data explorer

* Revert "sev2 accessibilitydefects in data explorer"

This reverts commit b84d5b572c.

* Sev2 accessibilitydefects

* Revert "Sev2 accessibilitydefects"

This reverts commit a4e60f106c.

* accessibilitydefects-data explorer

* Accessibility sev-2 defects-2

* corrections for 2278347,2278096 and fix for 2264174

* color for placeholder changed to 767474, margin is set to accommodate height between treeheader elements

* padding added for databaseheader, removed margin and restored padding to treenodeheader

src/Explorer/Controls/Tabs/TabComponent.tsx

@@ -46,10 +46,13 @@ export class TabComponent extends React.Component<TabComponentProps> {
       }
 
       let className = "toggleSwitch";
+      let ariaselected;
       if (index === this.props.currentTabIndex) {
         className += " selectedToggle";
+        ariaselected = true;
       } else {
         className += " unselectedToggle";
+        ariaselected = false;
       }
 
       return (
@@ -57,9 +60,10 @@ export class TabComponent extends React.Component<TabComponentProps> {
           <AccessibleElement
             as="span"
             className={className}
-            role="presentation"
+            role="tab"
             onActivated={() => this.setActiveTab(index)}
             aria-label={`Select tab: ${tab.title}`}
+            aria-selected={ariaselected}
           >
             {tab.title}
           </AccessibleElement>
@@ -77,7 +81,11 @@ export class TabComponent extends React.Component<TabComponentProps> {
 
     return (
       <div className="tabComponentContainer">
-        {!this.props.hideHeader && <div className="tabs tabSwitch">{this.renderTabTitles()}</div>}
+        {!this.props.hideHeader && (
+          <div className="tabs tabSwitch" role="tablist">
+            {this.renderTabTitles()}
+          </div>
+        )}
         <div className={className}>{currentTabContent.render()}</div>
       </div>
     );

src/Explorer/Controls/TreeComponent/treeComponent.less

@@ -3,7 +3,7 @@
 .treeComponent {
   .nodeItem {
     &:focus {
-      outline: 1px dashed @AccentMedium;
+      outline: 2px @AccentMedium;
     }
 
     .treeNodeHeader {