refractor: shared module

* Delete unused loader component.
* Make file upload component responsive.
* Add comments.

src/app/shared/delete-dialog/delete-dialog.component.ts

@@ -1,6 +1,10 @@
+/** Angular Imports */
 import { Component, OnInit, Inject } from '@angular/core';
 import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material';
 
+/**
+ * Delete dialog component.
+ */
 @Component({
   selector: 'mifosx-delete-dialog',
   templateUrl: './delete-dialog.component.html',
@@ -8,6 +12,10 @@ import { MatDialogRef, MAT_DIALOG_DATA } from '@angular/material';
 })
 export class DeleteDialogComponent implements OnInit {
 
+  /**
+   * @param dialogRef Component reference to dialog.
+   * @param data Provides a deleteContext.
+   */
   constructor(public dialogRef: MatDialogRef<DeleteDialogComponent>,
               @Inject(MAT_DIALOG_DATA) public data: any) { }