calculate common prefix when setting model

fixes issue when switching test run via combobox

Author: PhilippSalvisberg

sqldev/src/main/java/org/utplsql/sqldev/ui/runner/TestOverviewTableModel.xtend

@@ -32,7 +32,7 @@ class TestOverviewTableModel extends DefaultTableModel {
 
 	def setModel(LinkedHashMap<String, Test> tests) {
 		this.tests = tests
-		this.commonPrefix = null
+		this.commonPrefix = PrefixTools.commonPrefix(tests.keySet.toList)
 		fireTableDataChanged()
 	}
 
@@ -66,9 +66,6 @@ class TestOverviewTableModel extends DefaultTableModel {
 		if (test === null) {
 			return null
 		}
-		if (commonPrefix === null) {
-			commonPrefix = PrefixTools.commonPrefix(tests.keySet.toList)
-		}
 		switch (col) {
 			case 0: {
 				return test.statusIcon