updates to styles on app settings page:

- global: more bottom padding for panels
- app description textarea has no width contraint, constrained heigh
- fix extra padding in panel footers
- larger form columns for app name and description
- remove deprecated environment list
- do not need extra right padding on nested list items

styles/components/_accordion_table.scss

@@ -110,7 +110,7 @@
       font-size: $small-font-size;
       font-weight: $font-normal;
       background-color: $color-gray-lightest;
-      padding: $gap*2 $gap*7 $gap*5 $gap*4;
+      padding: $gap*2 $gap*4 $gap*5 $gap*4;
 
       th, td {
         .icon-link {