Anno fixes (easy) (#925)

* change wording from value to label

* tooltip position

* Padding for text & code whitespace

client/src/components/categorical/category.js

@@ -349,7 +349,7 @@ class Category extends React.Component {
                 <Popover
                   interactionKind={PopoverInteractionKind.HOVER}
                   boundary="window"
-                  position={Position.RIGHT}
+                  position={Position.RIGHT_TOP}
                   content={
                     <Menu>
                       <MenuItem

client/src/components/categorical/value.js

@@ -384,7 +384,7 @@ class CategoryValue extends React.Component {
                         data-testclass="handleDeleteValue"
                         data-testid={`handleDeleteValue-${metadataField}`}
                         onClick={this.handleDeleteValue}
-                        text="Delete this value, and reassign all cells to type 'unknown'"
+                        text="Delete this label, and reassign all cells to type 'unknown'"
                       />
                     ) : null}
                   </Menu>