update clear chat icon

Author: anna-shakhova

packages/devextreme-scss/scss/widgets/fluent/gridBase/_index.scss

@@ -1060,5 +1060,5 @@ $fluent-grid-base-group-panel-message-line-height: $fluent-button-text-line-heig
   @include ai-chat-messagelist-empty(
     $button-default-bg,
     $button-default-outlined-hover-bg,
-  )
+  );
 }

packages/devextreme-scss/scss/widgets/generic/gridBase/_index.scss

@@ -903,5 +903,5 @@ $generic-grid-base-cell-input-height: math.round($generic-base-line-height * $ge
   @include ai-chat-messagelist-empty(
     $button-default-bg,
     $button-default-outlined-bg-hover,
-  )
+  );
 }

packages/devextreme-scss/scss/widgets/material/gridBase/_index.scss

@@ -1037,5 +1037,5 @@ $material-grid-base-group-panel-message-line-height: $material-button-text-line-
   @include ai-chat-messagelist-empty(
     $button-default-bg,
     $button-default-outlined-hover-bg,
-  )
+  );
 }

packages/devextreme/js/__internal/grids/grid_core/ai_chat/const.ts

@@ -22,4 +22,4 @@ export const CLASSES = {
   aiChatEmptyImage: 'dx-ai-chat-messagelist-empty-image',
 };
 
-export const CLEAR_CHAT_ICON = 'chatdismiss';
+export const CLEAR_CHAT_ICON = 'clearhistory';