Use absolute folder path to open it as working dir in terminal (#11914)

### What does this PR do?
This changes proposal modifies the behavior of _Open in Terminal_ action, so the current directory path pass to terminal options in absolute path form instead of relative as it was before.

Signed-off-by: Vladyslav Zhukovskyi <vzhukovs@redhat.com>

### What issues does this PR fix or reference?
#10894 
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#### Release Notes
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#### Docs PR
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ide/che-core-ide-app/src/main/java/org/eclipse/che/ide/processes/OpenInTerminalAction.java

@@ -40,7 +40,6 @@
 @Singleton
 public class OpenInTerminalAction extends AbstractPerspectiveAction {
 
-  private CoreLocalizationConstant locale;
   private final ProcessesPanelPresenter processesPanelPresenter;
 
   interface Command extends SafeHtmlTemplates {
@@ -59,8 +58,6 @@ public OpenInTerminalAction(
         locale.openInTerminalAction(),
         null,
         machineResources.addTerminalIcon());
-    this.locale = locale;
-
     this.processesPanelPresenter = processesPanelPresenter;
   }
 
@@ -76,7 +73,7 @@ public void actionPerformed(ActionEvent event) {
       final Container parent = resource.getParent();
       resource = parent;
     }
-    Path path = resource.getLocation().makeRelative();
+    Path path = appContext.get().getProjectsRoot().append(resource.getLocation());
     Command cmdTmpl = GWT.create(Command.class);
     String command = cmdTmpl.openInTerminalCommand(path.toString()).asString();
     processesPanelPresenter.newTerminal(TerminalOptionsJso.create().withCommand(command), true);