fix button widgets style

files_cells/notebooks/en/widgets_en.ipynb

@@ -308,7 +308,12 @@
         "\n",
         ".button_save:active,\n",
         ".button_ngrok:active {\n",
-        "    filter: brightness(0.75);\n",
+        "    filter: brightness(0.75) !important;\n",
+        "}\n",
+        "\n",
+        "/* Removes ugly stroke from widget buttons. */\n",
+        ".jupyter-widgets.lm-Widget:focus {\n",
+        "    outline: none;\n",
         "}\n",
         "\n",
         "\n",

files_cells/notebooks/ru/widgets_ru.ipynb

@@ -308,7 +308,12 @@
         "\n",
         ".button_save:active,\n",
         ".button_ngrok:active {\n",
-        "    filter: brightness(0.75);\n",
+        "    filter: brightness(0.75) !important;\n",
+        "}\n",
+        "\n",
+        "/* Removes ugly stroke from widget buttons. */\n",
+        ".jupyter-widgets.lm-Widget:focus {\n",
+        "    outline: none;\n",
         "}\n",
         "\n",
         "\n",

files_cells/python/en/widgets_en.py

@@ -289,7 +289,12 @@ hr {
 
 .button_save:active,
 .button_ngrok:active {
-    filter: brightness(0.75);
+    filter: brightness(0.75) !important;
+}
+
+/* Removes ugly stroke from widget buttons. */
+.jupyter-widgets.lm-Widget:focus {
+    outline: none;
 }
 
 

files_cells/python/ru/widgets_ru.py

@@ -289,7 +289,12 @@ hr {
 
 .button_save:active,
 .button_ngrok:active {
-    filter: brightness(0.75);
+    filter: brightness(0.75) !important;
+}
+
+/* Removes ugly stroke from widget buttons. */
+.jupyter-widgets.lm-Widget:focus {
+    outline: none;
 }