IDEA-324898 Not contrast hover in the main toolbar when UI Theme is High Contrast

GitOrigin-RevId: 2b4fa38fdcd3610c7d15472439a468f589bbead6

platform/platform-impl/src/com/intellij/ide/ui/laf/intellijlaf.theme.json

@@ -826,7 +826,10 @@
 
     "TitlePane": {
       "background": "panel",
-      "Button.preferredSize": "47,28",
+      "Button": {
+        "hoverBackground": "#00000019",
+        "preferredSize": "47,28"
+      },
       "inactiveBackground": "panel",
       "inactiveInfoForeground": "grey04",
       "infoForeground": "grey01"

platform/platform-resources/src/themes/HighContrast.theme.json

@@ -506,11 +506,11 @@
         "background": "#000000",
         "hoverBackground": "#3333FF",
         "pressedBackground": "#3333FF",
-        "transparentHoverBackground": "#FFFFFF40"
+        "transparentHoverBackground": "#3333FF"
       }
     },
 
-    "TitlePane.Button.hoverBackground": "#FFFFFF40",
+    "TitlePane.Button.hoverBackground": "#3333FF",
 
     "Window.border" : "1,1,1,1,E6E6E6",
 

platform/platform-resources/src/themes/expUI/expUI_dark.theme.json

@@ -620,7 +620,8 @@
 
     "TitlePane": {
       "Button": {
-        "preferredSize": "44,40"
+        "preferredSize": "44,40",
+        "hoverBackground": "#FFFFFF10"
       }
     },
 

platform/platform-resources/src/themes/expUI/expUI_light.theme.json

@@ -636,7 +636,8 @@
       "background": "Grey13",
       "inactiveBackground": "Grey13",
       "Button": {
-        "preferredSize": "44,40"
+        "preferredSize": "44,40",
+        "hoverBackground": "#FFFFFF1A"
       }
     },
 

platform/platform-resources/src/themes/expUI/expUI_light_with_light_header.theme.json

@@ -48,6 +48,8 @@
       }
     },
 
+    "TitlePane.Button.hoverBackground": "#0000000D",
+
     "MenuBar.borderColor": "Grey12",
 
     "Notification.Shadow": {