refractor: accounting module (#300)

* Refractor components.
* Add resolvers.
* Add relative router links.
* Replace mat-icons by font-awesome icons.
* Add comments.

Fixes: #298

src/app/accounting/view-journal-entry/view-journal-entry.component.html

@@ -1,5 +1,7 @@
 <h1 mat-dialog-title>View Journal Entry</h1>
+
 <div mat-dialog-content>
+
   <table>
 
     <tr>
@@ -102,7 +104,9 @@
     </tr>
 
   </table>
+
 </div>
+
 <mat-dialog-actions align="end">
   <button mat-button mat-dialog-close>Close</button>
 </mat-dialog-actions>