gwallet.sln: cosmetic, make F# GUIDs uppercase

Due to this VS4Mac/MonoDevelop bug[1], GUIDs were incorrectly
lowercase here. Let's make them uppercase so that VS4Win doesn't
change again (and VS4Mac won't soon either, in v7.7).

[1] mono/monodevelop#5976

gwallet.sln

@@ -2,11 +2,11 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio 15
 VisualStudioVersion = 15.0.27130.0
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Backend", "src\GWallet.Backend\GWallet.Backend.fsproj", "{96F9B3E5-11F8-4F5F-AADC-51D0D995B3D2}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "GWallet.Backend", "src\GWallet.Backend\GWallet.Backend.fsproj", "{96F9B3E5-11F8-4F5F-AADC-51D0D995B3D2}"
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Backend.Tests", "src\GWallet.Backend.Tests\GWallet.Backend.Tests.fsproj", "{F9448076-88BE-4045-8704-A652D133E036}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "GWallet.Backend.Tests", "src\GWallet.Backend.Tests\GWallet.Backend.Tests.fsproj", "{F9448076-88BE-4045-8704-A652D133E036}"
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Frontend.Console", "src\GWallet.Frontend.Console\GWallet.Frontend.Console.fsproj", "{8413EEF5-69F5-499F-AE01-754E9541EF90}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "GWallet.Frontend.Console", "src\GWallet.Frontend.Console\GWallet.Frontend.Console.fsproj", "{8413EEF5-69F5-499F-AE01-754E9541EF90}"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "build", "build", "{9DFD61F8-2CED-47F1-BB3A-48A383D4751D}"
 	ProjectSection(SolutionItems) = preProject
@@ -20,9 +20,9 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "build", "build", "{9DFD61F8
 		scripts\replace.fsx = scripts\replace.fsx
 	EndProjectSection
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Backend.NetStandard", "src\GWallet.Backend.NetStandard\GWallet.Backend.NetStandard.fsproj", "{D1D192E0-F226-40AD-8D81-687F7E6F7DAB}"
+Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "GWallet.Backend.NetStandard", "src\GWallet.Backend.NetStandard\GWallet.Backend.NetStandard.fsproj", "{D1D192E0-F226-40AD-8D81-687F7E6F7DAB}"
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Frontend.XF.Mac", "src\GWallet.Frontend.XF.Mac\GWallet.Frontend.XF.Mac.fsproj", "{9E020D62-9160-49AC-A9CD-476CADAE0B87}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "GWallet.Frontend.XF.Mac", "src\GWallet.Frontend.XF.Mac\GWallet.Frontend.XF.Mac.fsproj", "{9E020D62-9160-49AC-A9CD-476CADAE0B87}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "GWallet.Frontend.XamForms.UWP", "src\GWallet.Frontend.XamForms.UWP\GWallet.Frontend.XamForms.UWP.csproj", "{DD7B4A7D-02E7-4DF7-9894-25743BDEC0C0}"
 EndProject
@@ -32,13 +32,13 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "docs", "docs", "{C90A30F5-1
 		ReadMe.md = ReadMe.md
 	EndProjectSection
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Frontend.XF.Gtk", "src\GWallet.Frontend.XF.Gtk\GWallet.Frontend.XF.Gtk.fsproj", "{578E4F5E-A33D-4C04-BD6C-22B48B789F36}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "GWallet.Frontend.XF.Gtk", "src\GWallet.Frontend.XF.Gtk\GWallet.Frontend.XF.Gtk.fsproj", "{578E4F5E-A33D-4C04-BD6C-22B48B789F36}"
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Frontend.XF.Android", "src\GWallet.Frontend.XF.Android\GWallet.Frontend.XF.Android.fsproj", "{24B7E0C6-9113-4430-8614-6E3AED7FE0C0}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "GWallet.Frontend.XF.Android", "src\GWallet.Frontend.XF.Android\GWallet.Frontend.XF.Android.fsproj", "{24B7E0C6-9113-4430-8614-6E3AED7FE0C0}"
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Frontend.XF", "src\GWallet.Frontend.XF\GWallet.Frontend.XF.fsproj", "{85236682-6463-4209-B66C-E0643EF12B46}"
+Project("{6EC3EE1D-3C4E-46DD-8F32-0CC8E7565705}") = "GWallet.Frontend.XF", "src\GWallet.Frontend.XF\GWallet.Frontend.XF.fsproj", "{85236682-6463-4209-B66C-E0643EF12B46}"
 EndProject
-Project("{f2a71f9b-5d33-465a-a702-920d77279786}") = "GWallet.Frontend.XF.iOS", "src\GWallet.Frontend.XF.iOS\GWallet.Frontend.XF.iOS.fsproj", "{5DD656CE-3319-46BB-B47F-BBED8CC722FD}"
+Project("{F2A71F9B-5D33-465A-A702-920D77279786}") = "GWallet.Frontend.XF.iOS", "src\GWallet.Frontend.XF.iOS\GWallet.Frontend.XF.iOS.fsproj", "{5DD656CE-3319-46BB-B47F-BBED8CC722FD}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution