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

Packages/lesiontracker/client/components/confirmDeleteDialog/confirmDeleteDialog.html

@@ -0,0 +1,16 @@
+<template name="confirmDeleteDialog">
+    <div id="confirmDeleteDialog" tabindex="0">
+        {{ #if title }}
+        <h5>{{title}}</h5>
+        {{ else }}
+        <h5>Remove data from Timepoint?</h5>
+        {{/if}}
+        {{ #if text }}
+        <p>{{text}}</p>
+        {{ else }}
+        <p>Are you sure you would like to remove the measurement data at this timepoint?</p>
+        {{/if}}
+        <button id="cancel" class="btn btn-link" tabindex="1">Cancel</button>
+        <button id="confirm" class="btn btn-primary" tabindex="0">OK</button>
+    </div>
+</template>