The Admin > Credentials > Manage Windows Credentials page is unnecessarily short due to three height constraints in the element's inline CSS. Since it already has a "Number of items per page" drop-down, this gives us admins control over how much we want to see per page. And the browser side-bar already handles scrolling, so there's no need to prematurely limit the vertical height of the resulting credentials table - we have two means of controlling it ourselves 
Please consider removing these three height constraints:
#ext-gen5
height: 244px;
<div class="x-panel-body x-panel-body-noheader" id="ext-gen5" style="width: 868px; height: 244px;">
#ext-gen10
height: 244px;
<div class="x-grid2" hidefocus="true" id="ext-gen10" style="width: 868px; height: 244px;">
#ext-gen13
height: 2020px;
<div class="x-grid3-scroller" id="ext-gen13" style="overflow-x: hidden; width: 868px; height: 220px;">
Default View:

Improved View (without height constraints):
