move tooltip styles to its own file

src/app/ui/styles/tooltip-styles.js

+var csjs = require('csjs-inject')
+var styleGuide = require('remix-lib').ui.themeChooser
+var styles = styleGuide.chooser()
+
+var css = csjs`
+  .tooltip {
+    z-index: 1001;
+    display: inline-block;
+    position: fixed;
+    background-color: ${styles.remix.tooltip_CopyToClipboard_BackgroundColor};
+    color: ${styles.remix.tooltip_CopyToClipboard_Color};
+    min-height: 50px;
+    min-width: 290px;
+    padding: 16px 24px 12px;
+    border-radius: 3px;
+    bottom: -300;
+    left: 40%;
+    font-size: 12px;
+    text-align: center;
+    -webkit-animation-name: animatebottom;
+    -webkit-animation-duration: 6s;
+    animation-name: animatebottom;
+    animation-duration: 6s
+  }
+  @-webkit-keyframes animatebottom  {
+    0% {bottom: -300px}
+    20% {bottom: 0}
+    50% {bottom: 0}
+    100% {bottom: -300px}
+  }
+  @keyframes animatebottom  {
+    0% {bottom: -300px}
+    20% {bottom: 0}
+    50% {bottom: 0}
+    100% {bottom: -300px}
+  }
+`
+
+module.exports = css

src/app/ui/tooltip.js

 var yo = require('yo-yo')
-// -------------- styling ----------------------
-var csjs = require('csjs-inject')
-var styleGuide = require('remix-lib').ui.themeChooser
-var styles = styleGuide.chooser()
-
-var css = csjs`
-  .tooltip {
-    z-index: 1001;
-    display: inline-block;
-    position: fixed;
-    background-color: ${styles.remix.tooltip_CopyToClipboard_BackgroundColor};
-    color: ${styles.remix.tooltip_CopyToClipboard_Color};
-    min-height: 50px;
-    min-width: 290px;
-    padding: 16px 24px 12px;
-    border-radius: 3px;
-    bottom: -300;
-    left: 40%;
-    font-size: 12px;
-    text-align: center;
-    -webkit-animation-name: animatebottom;
-    -webkit-animation-duration: 6s;
-    animation-name: animatebottom;
-    animation-duration: 6s
-  }
-  @-webkit-keyframes animatebottom  {
-    0% {bottom: -300px}
-    20% {bottom: 0}
-    50% {bottom: 0}
-    100% {bottom: -300px}
-  }
-  @keyframes animatebottom  {
-    0% {bottom: -300px}
-    20% {bottom: 0}
-    50% {bottom: 0}
-    100% {bottom: -300px}
-  }
-`
+var css = require('./styles/tooltip-styles')
 
 module.exports = function addTooltip (tooltipText) {
   var tooltip = yo`<div class=${css.tooltip}>${tooltipText}</div>`