[editor] Remove unwanted dimension fields from model properties tab

Also set geometry element to always use fixed size, which is all that 
works anyway.

projects/common/models/elements/geometry/geometry.ts

@@ -29,7 +29,7 @@ export class GeometryElement extends UIElement implements PositionedUIElement {
     this.showFullscreenButton = element.showFullscreenButton !== undefined ? element.showFullscreenButton : true;
     this.customToolBar = element.customToolBar !== undefined ? element.customToolBar : '';
 
-    this.position = UIElement.initPositionProps({ ...element.position });
+    this.position = UIElement.initPositionProps({ ...element.position, fixedSize: true }); // yes, always stay fixed
   }
 
   getElementComponent(): Type<ElementComponent> {

projects/editor/src/app/components/properties-panel/model-properties-tab/element-model-properties.component.html

@@ -166,22 +166,6 @@
     </button>
   </mat-form-field>
 
-
-  <mat-form-field *ngIf="combinedProperties.width != null"
-                  matTooltip="{{'propertiesPanel.width' | translate }}"
-                  appearance="fill">
-    <mat-label>{{'propertiesPanel.width' | translate }}</mat-label>
-    <input matInput type="number" [value]="$any(combinedProperties.width)"
-           (input)="updateModel.emit({ property: 'width', value: $any($event.target).value })">
-  </mat-form-field>
-  <mat-form-field *ngIf="combinedProperties.height != null"
-                  matTooltip="{{'propertiesPanel.height' | translate }}"
-                  appearance="fill">
-    <mat-label>{{'propertiesPanel.height' | translate }}</mat-label>
-    <input matInput type="number" [value]="$any(combinedProperties.height)"
-           (input)="updateModel.emit({ property: 'height', value: $any($event.target).value })">
-  </mat-form-field>
-
   <mat-checkbox *ngIf="combinedProperties.showResetIcon !== undefined"
                 [checked]="$any(combinedProperties.showResetIcon)"
                 (change)="updateModel.emit({ property: 'showResetIcon', value: $event.checked })">