Remove Tab Overlay on Project Manager Startup + More Fixes (#3666)

* Refocuses from tab to button on projects screen fist time it is opened

Signed-off-by: nggieber <nggieber@amazon.com>

* Adds border highlighting to big buttons when they are focused

Signed-off-by: nggieber <nggieber@amazon.com>

* Fixes issues where project buttons aren't found or deleted on projects screen

Signed-off-by: nggieber <nggieber@amazon.com>

* Adds tooltip to project name showing project path

Signed-off-by: nggieber <nggieber@amazon.com>

Code/Tools/ProjectManager/Resources/ProjectManager.qss

@@ -213,6 +213,10 @@ QTabBar::tab:focus {
                             stop: 0 #555555, stop: 1.0 #777777);
 }
 
+#horizontalSeparatingLine {
+    color: #666666;
+}
+
 /************** Project Settings **************/
 #projectSettings {
     margin-top:42px;
@@ -293,8 +297,6 @@ QTabBar::tab:focus {
     border:none;
 }
 
-
-
 #projectSettingsTab::tab-bar {
     left: 60px;
 }
@@ -360,6 +362,10 @@ QTabBar::tab:focus {
     color: #1e70eb;
 }
 
+#firstTimeContent > QPushButton:focus {
+    border: 1px solid #1e70eb;
+}
+
 #firstTimeContent > QPushButton:pressed {
     border: 1px solid #0e60eb;
     color: #0e60eb;
@@ -400,7 +406,8 @@ QTabBar::tab:focus {
 }
 
 #projectButton > #labelButton:hover,
-#projectButton > #labelButton:pressed  {
+#projectButton > #labelButton:pressed,
+#projectButton > #labelButton:focus {
     border:1px solid #1e70eb;
 }