Added About modal with last commit hash, moved some dialogs to lesionTracker package from viewerbase (OHIF-52)

Packages/lesiontracker/client/components/emailVerification/emailVerification.styl

@@ -0,0 +1,15 @@
+#emailVerification
+  #emailVerificationContent
+    position: absolute
+    top: 0
+    bottom: 0
+    left: 0
+    right: 0
+    margin: auto
+    width: 60%
+    height: 20%
+    z-index: 100
+    border-radius: 5px
+    padding: 10px 20px 10px 20px
+    background-color: rgba(255,255,255,1)
+    outline: none