Fix height of connect screen (#8675)

ui/app/components/app/permissions-connect-header/index.scss

@@ -1,5 +1,6 @@
 .permissions-connect-header {
   display: flex;
+  flex: 0;
   flex-direction: column;
   justify-content: center;
   width: 92%;

ui/app/pages/permissions-connect/choose-account/index.scss

@@ -41,18 +41,19 @@
   }
 
   &__accounts-list {
+    flex: 1 1 0;
     width: 92%;
     border: 1px solid #D0D5DA;
     box-sizing: border-box;
     border-radius: 8px;
     margin-top: 8px;
-    max-height: 238px;
     overflow-y: auto;
   }
 
   &__accounts-list-header--one-item,
   &__accounts-list-header--two-items {
     display: flex;
+    flex: 0;
     margin-top: 36px;
     width: 100%;
     padding-left: 15px;
@@ -146,7 +147,7 @@
 
   &__footer-container {
     width: 100%;
-    flex: 1 1 auto;
+    flex: 0;
     display: flex;
     flex-direction: column;
     justify-content: flex-end;