fix raw_input CSS

I had to express padding in px, not em for consistent appearance.
I'm not sure why.

IPython/html/static/notebook/less/outputarea.less

@@ -140,11 +140,11 @@ div.output_javascript:empty {
 /* raw_input styles */
 
 div.raw_input {
-    padding-top: 0px;
-    padding-bottom: 0px;
-    height: 1em;
     line-height: 1em;
     font-family: @monoFontFamily;
+    // for some reason, em padding doesn't compute the same for raw_input
+    // that is not the first input, but px does
+    padding-top: 5px;
 }
 
 span.input_prompt {
@@ -156,12 +156,16 @@ input.raw_input {
     font-size: inherit;
     color: inherit;
     width: auto;
-    margin: -2px 0px 0px 1px;
+    margin: 0px 0px 0px 1px;
     padding-left: 1px;
-    padding-top: 2px;
+    padding-top: 0px;
     height: 1em;
 }
 
+input.raw_input:focus {
+    box-shadow: none;
+}
+
 p.p-space {
     margin-bottom: 10px;
 }

IPython/html/static/style/ipython.min.css

@@ -123,9 +123,10 @@ div.output_stderr{background:#fdd;}
 div.output_latex{text-align:left}
 div.output_javascript:empty{padding:0}
 .js-error{color:#8b0000}
-div.raw_input{padding-top:0;padding-bottom:0;height:1em;line-height:1em;font-family:monospace}
+div.raw_input{line-height:1em;font-family:monospace;padding-top:5px}
 span.input_prompt{font-family:inherit}
-input.raw_input{font-family:inherit;font-size:inherit;color:inherit;width:auto;margin:-2px 0 0 1px;padding-left:1px;padding-top:2px;height:1em}
+input.raw_input{font-family:inherit;font-size:inherit;color:inherit;width:auto;margin:0 0 0 1px;padding-left:1px;padding-top:0;height:1em}
+input.raw_input:focus{box-shadow:none}
 p.p-space{margin-bottom:10px}
 .rendered_html{color:#000;}.rendered_html em{font-style:italic}
 .rendered_html strong{font-weight:bold}

IPython/html/static/style/style.min.css

@@ -1400,9 +1400,10 @@ div.output_stderr{background:#fdd;}
 div.output_latex{text-align:left}
 div.output_javascript:empty{padding:0}
 .js-error{color:#8b0000}
-div.raw_input{padding-top:0;padding-bottom:0;height:1em;line-height:1em;font-family:monospace}
+div.raw_input{line-height:1em;font-family:monospace;padding-top:5px}
 span.input_prompt{font-family:inherit}
-input.raw_input{font-family:inherit;font-size:inherit;color:inherit;width:auto;margin:-2px 0 0 1px;padding-left:1px;padding-top:2px;height:1em}
+input.raw_input{font-family:inherit;font-size:inherit;color:inherit;width:auto;margin:0 0 0 1px;padding-left:1px;padding-top:0;height:1em}
+input.raw_input:focus{box-shadow:none}
 p.p-space{margin-bottom:10px}
 .rendered_html{color:#000;}.rendered_html em{font-style:italic}
 .rendered_html strong{font-weight:bold}