thumnials styles

Signed-off-by: Max You <[email protected]>

src/customComponents.json

@@ -281,7 +281,7 @@
 				"outputs": "@Output() {{variableName}}hidden = new EventEmitter<any>(); @Output() {{variableName}}shown = new EventEmitter<any>();",
 				"template": "<button ngbPopover='{{model.description}}' class='btn btn-outline-secondary' {{#if model.openDelay}}openDelay={{model.openDelay}}{{/if}} {{#if model.closeDelay}}closeDelay={{model.closeDelay}}{{/if}} {{#if model.triggers}}triggers='{{model.triggers}}'{{/if}} placement='{{model.placement}}' {{#if model.disabled}}disablePopover{{/if}}>{{model.title}}</button>"
 			},
-			"htmlThumbnail": "<button style='background: white; padding: .375rem .75rem; font-size: 1rem; color: #6c757d; text-align: center; vertical-align: middle; line-height: 1.5rem; border: 1px solid #6c757d; border-radius: .375rem; margin-left: 10px; margin-top: 1rem;' {{#if disabled}}disabled{{/if}}>{{title}}</button>"
+			"htmlThumbnail": "<button style='background: white; padding: .375rem .75rem; font-size: 1rem; color: #6c757d; text-align: center; vertical-align: middle; line-height: 1.5rem; border: 1px solid #6c757d; border-radius: .375rem; margin-left: 5px; margin-top: 1rem;' {{#if disabled}}disabled{{/if}}>{{title}}</button>"
 		},
 		{
 			"type": "bs-tooltip",