feat: add tooltip on theme selector

src/app/components/presentationals/theme-selector/theme-selector.presentational.html

@@ -9,8 +9,9 @@
                 [value]="theme"
     ><img class="option-theme-img"
           style="max-height: 30px; max-width: 30px; padding-top: 16px;"
+          [matTooltip]="stringUtil.convertToPascalCase(theme)"
+          [matTooltipPosition]="'after'"
           [src]="'assets/themes/'+theme+'/logo.svg'"></mat-option>
-<!--    {{stringUtil.convertToPascalCase(theme)}}-->
   </mat-select>
 </mat-form-field>