Apply /utf-8 flag to all build configs

This addresses a comment in #368. This enables building on computers
with non-English system locales.

Author: Gumball2415

Dn-FamiTracker.vcxproj

@@ -203,7 +203,7 @@
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/FS %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/FS /utf-8 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ResourceCompile>
       <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
@@ -243,7 +243,7 @@
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/FS %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/FS /utf-8 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ResourceCompile>
       <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
@@ -283,7 +283,7 @@
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/FS %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/FS /utf-8 %(AdditionalOptions)</AdditionalOptions>
       <OmitFramePointers>false</OmitFramePointers>
     </ClCompile>
     <ResourceCompile>
@@ -324,7 +324,7 @@
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/FS %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/FS /utf-8 %(AdditionalOptions)</AdditionalOptions>
       <OmitFramePointers>false</OmitFramePointers>
     </ClCompile>
     <ResourceCompile>
@@ -366,7 +366,7 @@
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/FS %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/FS /utf-8 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ResourceCompile>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
@@ -409,7 +409,7 @@
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/FS %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/FS /utf-8 %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <ResourceCompile>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
@@ -496,7 +496,7 @@
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <LanguageStandard>stdcpp17</LanguageStandard>
       <TreatWarningAsError>true</TreatWarningAsError>
-      <AdditionalOptions>/FS %(AdditionalOptions)</AdditionalOptions>
+      <AdditionalOptions>/FS /utf-8 %(AdditionalOptions)</AdditionalOptions>
       <OmitFramePointers>false</OmitFramePointers>
     </ClCompile>
     <ResourceCompile>