fix style

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/formModel/tasks/flink.vue

@@ -557,4 +557,12 @@
       }
     }
   }
+  .vue-treeselect--disabled {
+    .vue-treeselect__control {
+      background-color: #ecf3f8;
+      .vue-treeselect__single-value {
+        color: #6d859e;
+      }
+    }
+  }
 </style>

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/formModel/tasks/mr.vue

@@ -427,4 +427,12 @@
       }
     }
   }
+  .vue-treeselect--disabled {
+    .vue-treeselect__control {
+      background-color: #ecf3f8;
+      .vue-treeselect__single-value {
+        color: #6d859e;
+      }
+    }
+  }
 </style>

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/formModel/tasks/python.vue

@@ -333,3 +333,13 @@
     components: { mLocalParams, mListBox, mResources,Treeselect }
   }
 </script>
+<style lang="scss" rel="stylesheet/scss" scope>
+  .vue-treeselect--disabled {
+    .vue-treeselect__control {
+      background-color: #ecf3f8;
+      .vue-treeselect__single-value {
+        color: #6d859e;
+      }
+    }
+  }
+</style>
\ No newline at end of file

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/formModel/tasks/shell.vue

@@ -396,5 +396,12 @@
     right: -12px;
     top: -16px;
   }
-
+  .vue-treeselect--disabled {
+    .vue-treeselect__control {
+      background-color: #ecf3f8;
+      .vue-treeselect__single-value {
+        color: #6d859e;
+      }
+    }
+  }
 </style>

dolphinscheduler-ui/src/js/conf/home/pages/dag/_source/formModel/tasks/spark.vue

@@ -606,4 +606,12 @@
       }
     }
   }
+  .vue-treeselect--disabled {
+    .vue-treeselect__control {
+      background-color: #ecf3f8;
+      .vue-treeselect__single-value {
+        color: #6d859e;
+      }
+    }
+  }
 </style>