Add icon button style.

frontend/src/app/components/publication-edition/publication-edition.component.html

@@ -58,13 +58,6 @@
                             i18n-matTooltip>
                         H3
                     </button>
-                    <button type="button"
-                            (click)="selectAPicture()"
-                            matTooltip="Click to insert a picture"
-                            matRipple
-                            i18n-matTooltip>
-                        <mat-icon>image</mat-icon>
-                    </button>
                     <button type="button"
                             (click)="insertLink()"
                             matTooltip="Click to insert a link"
@@ -72,6 +65,13 @@
                             i18n-matTooltip>
                         <mat-icon>link</mat-icon>
                     </button>
+                    <button type="button"
+                            (click)="selectAPicture()"
+                            matTooltip="Click to insert a picture"
+                            matRipple
+                            i18n-matTooltip>
+                        <mat-icon>image</mat-icon>
+                    </button>
                     <button type="button"
                             (click)="displayCodeBlockDialog()"
                             matTooltip="Click to insert a code block"