Do not use executor name with mnemonic it run configuration dialog (UX-540)

+ change mnemonic of `Allow parallel run` to U
+ replace removing mnemonics from getStartActionText to just calling getActionText

The motivation is described in the ticket.
Removing mnemonic seems to be safe here as:

1) the mnemonic was assigned to a default button;
2) the mnemonic might be different in the same dialog depending on executor, so habit cannot be strong here.

java/execution/impl/src/com/intellij/execution/JavaTestFrameworkRunnableState.java

@@ -265,7 +265,7 @@ public abstract class JavaTestFrameworkRunnableState<T extends
     if (Comparing.strEqual(forkMode, "none")) {
       if (forkPerModule()) {
         if (isExecutorDisabledInForkedMode()) {
-          final String actionName = UIUtil.removeMnemonic(executor.getStartActionText());
+          final String actionName = executor.getActionName();
           throw new CantRunException("'" + actionName + "' is disabled when per-module working directory is configured.<br/>" +
                                      "Please specify single working directory, or change test scope to single module.");
         }

platform/lang-impl/src/com/intellij/execution/actions/ChooseRunConfigurationPopup.java

@@ -1123,7 +1123,7 @@ public class ChooseRunConfigurationPopup implements ExecutorProvider {
         if (new EditConfigurationsDialog(project) {
           @Override
           protected void init() {
-            setOKButtonText(executor.getStartActionText());
+            setOKButtonText(executor.getActionName());
             setOKButtonIcon(executor.getIcon());
             myExecutor = executor;
             super.init();

platform/lang-impl/src/com/intellij/execution/impl/RunDialog.java

@@ -37,7 +37,7 @@ public class RunDialog extends DialogWrapper implements RunDialogBase {
 
     setTitle(executor.getId());
 
-    setOKButtonText(executor.getStartActionText());
+    setOKButtonText(executor.getActionName());
     setOKButtonIcon(executor.getIcon());
 
     myConfigurable = new ProjectRunConfigurationConfigurable(project, this);

platform/platform-resources-en/src/messages/ExecutionBundle.properties

@@ -318,7 +318,7 @@ show.swing.inspector=&Enable capturing form snapshots
 show.swing.inspector.disabled=&Enable capturing form snapshots (requires JRE 5.0 or higher)
 before.run.property.make=Make
 run.configuration.store.place.option=&Share
-run.configuration.allow.running.parallel=Allow &parallel run
+run.configuration.allow.running.parallel=Allow parallel r&un
 run.configuration.default.type.description=configuration
 
 #GeneralCommandLine

platform/testRunner/src/com/intellij/execution/testframework/actions/AbstractRerunFailedTestsAction.java

@@ -30,7 +30,6 @@ import com.intellij.openapi.util.InvalidDataException;
 import com.intellij.openapi.util.WriteExternalException;
 import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.util.containers.ContainerUtil;
-import com.intellij.util.ui.UIUtil;
 import org.jdom.Element;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -185,7 +184,7 @@ public class AbstractRerunFailedTestsAction extends AnAction implements AnAction
                                                         boolean cellHasFocus) {
             final Component component = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
             if (value instanceof Executor) {
-              setText(UIUtil.removeMnemonic(((Executor)value).getStartActionText()));
+              setText(((Executor)value).getActionName());
               setIcon(((Executor)value).getIcon());
             }
             return component;