在特定情况下，即使可用内存大于预计分配的内存，仍出现“（可用 xx GB）“字样

Fixes #5721

Plain Craft Launcher 2/Pages/PageSetup/PageSetupLaunch.xaml.vb

@@ -211,7 +211,7 @@
         End If
         '设置文本
         LabRamGame.Text = If(RamGame = Math.Floor(RamGame), RamGame & ".0", RamGame) & " GB" &
-                          If(RamGame <> RamGameActual, " (可用 " & If(RamGameActual = Math.Floor(RamGameActual), RamGameActual & ".0", RamGameActual) & " GB)", "")
+                          If(Math.Abs(RamGame - RamGameActual) > 0.05, " (可用 " & If(RamGameActual = Math.Floor(RamGameActual), RamGameActual & ".0", RamGameActual) & " GB)", "")
         LabRamUsed.Text = If(RamUsed = Math.Floor(RamUsed), RamUsed & ".0", RamUsed) & " GB"
         LabRamTotal.Text = " / " & If(RamTotal = Math.Floor(RamTotal), RamTotal & ".0", RamTotal) & " GB"
         LabRamWarn.Visibility = If(RamGame = 1 AndAlso Not JavaIs64Bit() AndAlso Not Is32BitSystem AndAlso JavaList.Any, Visibility.Visible, Visibility.Collapsed)

Plain Craft Launcher 2/Pages/PageVersion/PageVersionSetup.xaml.vb

@@ -170,7 +170,7 @@
         End If
         '设置文本
         LabRamGame.Text = If(RamGame = Math.Floor(RamGame), RamGame & ".0", RamGame) & " GB" &
-                          If(RamGame <> RamGameActual, " (可用 " & If(RamGameActual = Math.Floor(RamGameActual), RamGameActual & ".0", RamGameActual) & " GB)", "")
+                          If(Math.Abs(RamGame - RamGameActual) > 0.05, " (可用 " & If(RamGameActual = Math.Floor(RamGameActual), RamGameActual & ".0", RamGameActual) & " GB)", "")
         LabRamUsed.Text = If(RamUsed = Math.Floor(RamUsed), RamUsed & ".0", RamUsed) & " GB"
         LabRamTotal.Text = " / " & If(RamTotal = Math.Floor(RamTotal), RamTotal & ".0", RamTotal) & " GB"
         LabRamWarn.Visibility = If(RamGame = 1 AndAlso Not JavaIs64Bit(PageVersionLeft.Version) AndAlso Not Is32BitSystem AndAlso JavaList.Any, Visibility.Visible, Visibility.Collapsed)