Implement ability to disable certain SNI icons

Implements https://github.com/scorpion-26/gBar/issues/69 (nice)

data/config

@@ -165,7 +165,9 @@ EnableSNI: true
 # SNIIconSize sets the icon size for a SNI icon.
 # SNIPaddingTop Can be used to push the Icon down. Negative values are allowed
 # SNIIconName overrides what icon from an icon theme to display.
+# SNIDisabled prevents an icon from being registered.
 # For all SNI properties: The first parameter is a filter of the tooltip(The text that pops up, when the icon is hovered) of the icon.
+# The wildcard filter '*' does not work for SNIIconName and SNIDisabled
 
 # Scale everything down to 25 pixels ('*' as filter means everything)
 #SNIIconSize: *, 25
@@ -175,6 +177,8 @@ EnableSNI: true
 #SNIPaddingTop: Discord, 5
 # Override the default icon given to gBar by discord to an icon theme supplied one (Example is from papirus theme)
 #SNIIconName: Discord, discord-tray
+# Prevents steam from displaying. Note: Steam doesn't have a tooltip, which means the object path is filtered instead.
+#SNIDisabled: steam, true
 
 # These set the range for the network widget. The widget changes colors at six intervals:
 #    - Below Min...Bytes ("under")

src/Config.cpp

@@ -299,6 +299,7 @@ void Config::Load()
         AddConfigVar("SNIIconSize", config.sniIconSizes, lineView, foundProperty);
         AddConfigVar("SNIPaddingTop", config.sniPaddingTop, lineView, foundProperty);
         AddConfigVar("SNIIconName", config.sniIconNames, lineView, foundProperty);
+        AddConfigVar("SNIDisabled", config.sniDisabled, lineView, foundProperty);
         // Modern map syntax
         AddConfigVar("WorkspaceSymbol", config.workspaceSymbols, lineView, foundProperty);
         // Legacy syntax

src/Config.h

@@ -85,6 +85,7 @@ public:
     std::unordered_map<std::string, uint32_t> sniIconSizes;
     std::unordered_map<std::string, int32_t> sniPaddingTop;
     std::unordered_map<std::string, std::string> sniIconNames;
+    std::unordered_map<std::string, bool> sniDisabled;
 
     // Only affects outputs (i.e.: speakers, not microphones). This remaps the range of the volume; In percent
     double audioMinVolume = 0.f;   // Map the minimum volume to this value

src/SNI.cpp

@@ -166,8 +166,22 @@ namespace SNI
         }
 
         bool wasExplicitOverride = false;
+        for (auto& [filter, disabled] : Config::Get().sniDisabled)
+        {
+            if (ItemMatchesFilter(item, filter, wasExplicitOverride))
+            {
+                if (disabled)
+                {
+                    LOG("SNI: Disabling item due to config");
+                    // We're done here.
+                    return item;
+                }
+            }
+        }
+
         // First try icon theme querying
         std::string iconName;
+        wasExplicitOverride = false;
         for (auto& [filter, name] : Config::Get().sniIconNames)
         {
             if (ItemMatchesFilter(item, filter, wasExplicitOverride))