Resolve "Amélioration page portail"

Closes #26 (closed)

client/src/app/admin/instance/components/design-form-group.component.html

-<form [formGroup]="form" novalidate>
-    <accordion-group heading="Design">
-        <div class="form-row">
-            <div class="form-group col-md-6">
-                <label for="design_color_picker">Instance color (picker)</label>
-                <input class="form-control" type="color" id="design_color_picker" [value]="form.value.design_color" formControlName="design_color">
-            </div>
-            <div class="form-group col-md-6">
-                <label for="design_color_input">Instance color (value)</label>
-                <input type="text" class="form-control" id="design_color_input" [value]="form.value.design_color" formControlName="design_color">
-            </div>
-        </div>
-        <app-file-select-form-control
-            [form]="form"
-            [disabled]="dataPathEmpty"
-            [controlName]="'design_logo'"
-            [controlLabel]="'Logo'"
-            [rootDirectory]="rootDirectory"
-            [rootDirectoryIsLoading]="rootDirectoryIsLoading"
-            [rootDirectoryIsLoaded]="rootDirectoryIsLoaded"
-            (loadRootDirectory)="loadRootDirectory.emit($event)">
-        </app-file-select-form-control>
-        <app-file-select-form-control
-            [form]="form"
-            [disabled]="dataPathEmpty"
-            [controlName]="'design_favicon'"
-            [controlLabel]="'Favicon'"
-            [rootDirectory]="rootDirectory"
-            [rootDirectoryIsLoading]="rootDirectoryIsLoading"
-            [rootDirectoryIsLoaded]="rootDirectoryIsLoaded"
-            (loadRootDirectory)="loadRootDirectory.emit($event)">
-        </app-file-select-form-control>
-    </accordion-group>
-</form>