Use more user-friendly warning

Author: JustArchi

ArchiSteamFarm/Core/OS.cs

@@ -298,7 +298,7 @@ private static async Task LinuxKeepSystemActive() {
 		} catch (ConnectException e) {
 			// Possible if no DBus is available at all
 			ASF.ArchiLogger.LogGenericDebuggingException(e);
-			ASF.ArchiLogger.LogGenericError(Strings.FormatWarningFailedWithError(nameof(connection)));
+			ASF.ArchiLogger.LogGenericWarning(Strings.WarningNoSystemRequiredLinuxDependencies);
 
 			return;
 		}
@@ -339,7 +339,7 @@ private static async Task LinuxKeepSystemActive() {
 		} catch (DBusException e) {
 			// Possible if login manager does not support inhibit, although that should be super rare
 			ASF.ArchiLogger.LogGenericDebuggingException(e);
-			ASF.ArchiLogger.LogGenericError(Strings.FormatWarningFailedWithError(nameof(connection)));
+			ASF.ArchiLogger.LogGenericWarning(Strings.WarningNoSystemRequiredLinuxDependencies);
 
 			return;
 		}

ArchiSteamFarm/Localization/Strings.resx

@@ -800,4 +800,7 @@ Process uptime: {1}</value>
 		<value>Input: {0}</value>
 		<comment>{0} will be replaced by text input from the user.</comment>
 	</data>
+	<data name="WarningNoSystemRequiredLinuxDependencies" xml:space="preserve">
+		<value>You've declared --system-required, although your OS is missing required dependencies for that feature to work. Consider installing dbus, although you can also safely ignore this warning if you do not require inhibition to work properly.</value>
+	</data>
 </root>