FIX: Export model toggle

* [vuex] unknown action type: model/showModelPlaceholder
* [vuex] unknown action type: workspace/showExportCommitData

Author: mittalyashu

src/renderer/components/history.vue

@@ -90,8 +90,7 @@ export default {
 			})
 		},
 		exportCommitDetail() {
-			this.$store.dispatch("model/showModelPlaceholder")
-			this.$store.dispatch("workspace/showExportCommitData")
+			this.$store.dispatch("model/showExportCommitData")
 		}
 	},
 	mounted() {

src/renderer/components/model/exportCommitData.vue

@@ -63,8 +63,7 @@ export default {
 			this.closeModel()
 		},
 		closeModel() {
-			this.$store.dispatch("model/showModelPlaceholder")
-			this.$store.dispatch("workspace/showExportCommitData")
+			this.$store.dispatch("model/showExportCommitData")
 		}
 	}
 }