<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/c3e82de020e3c9b98c325cd0dd651d2ecae5a7cb80933f5d9a968a1a206eaad3/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313639333633352f3934343538372f61366530363138362d303263322d313165332d383666642d3835323236336335353531662e6a7067"><img src="https://camo.githubusercontent.com/c3e82de020e3c9b98c325cd0dd651d2ecae5a7cb80933f5d9a968a1a206eaad3/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313639333633352f3934343538372f61366530363138362d303263322d313165332d383666642d3835323236336335353531662e6a7067" alt="example" data-canonical-src="https://f.cloud.github.com/assets/1693635/944587/a6e06186-02c2-11e3-86fd-852263c5551f.jpg" style="max-width: 100%;"></a></p>
<p dir="auto">Perhaps if a panel includes only a list-group we do not pad the header and remove the bottom 1px border?  Therefore getting something like the following:</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://camo.githubusercontent.com/99499acff971c5bba715be09ec5bdea166285310b47af6806fb6c17d1c080eb3/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313639333633352f3934343539322f64396536646230302d303263322d313165332d383737612d3531393663306636666434642e6a7067"><img src="https://camo.githubusercontent.com/99499acff971c5bba715be09ec5bdea166285310b47af6806fb6c17d1c080eb3/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f313639333633352f3934343539322f64396536646230302d303263322d313165332d383737612d3531393663306636666434642e6a7067" alt="example2" data-canonical-src="https://f.cloud.github.com/assets/1693635/944592/d9e6db00-02c2-11e3-877a-5196c0f6fd4d.jpg" style="max-width: 100%;"></a></p>
<p dir="auto">A panel containing a list group only (with no introductory content) renders with a double border 15px apart</p>