Fix incorrect newline handling in error reporter

Issue duplicate detection didn't handle cases where the stacktrace
contained different newline characters.

Resolves #456

Author: DenWav

src/main/kotlin/com/demonwav/mcdev/error/AnonymousFeedback.kt

@@ -109,7 +109,7 @@ object AnonymousFeedback {
         val list = getAllIssues("https://api.github.com/repos/minecraft-dev/MinecraftDev/issues" +
                                     "?state=all&creator=minecraft-dev-autoreporter&per_page=100", factory) ?: return null
         val block = list.firstOrNull {
-            val body = it["body"] as? String ?: return@firstOrNull false
+            val body = (it["body"] as? String ?: return@firstOrNull false).replace(Regex("[\r\n]+"), "\n")
 
             // We can't comment on locked issues
             if (it["locked"] as Boolean) {

src/main/kotlin/com/demonwav/mcdev/error/ErrorBean.kt

@@ -15,7 +15,7 @@ import com.intellij.util.ExceptionUtil
 
 // It's easier to just re-use the code that we already were using, rather than changing to a map like
 // Jetbrains said to do in the deprecation message
-class ErrorBean(throwable: Throwable?, val lastAction: String) {
+class ErrorBean(throwable: Throwable?, val lastAction: String?) {
 
     val stackTrace: String? = if (throwable != null) ExceptionUtil.getThrowableText(throwable) else null
     var message: String? = null

src/main/kotlin/com/demonwav/mcdev/error/IdeaITNProxy.kt

@@ -36,7 +36,7 @@ object IdeaITNProxy {
         params["App Build"] = appInfo.build.asString()
         params["App Version"] = appInfo.fullVersion
 
-        if (error.lastAction.isBlank()) {
+        if (error.lastAction.isNullOrBlank()) {
             params["Last Action"] = "None"
         } else {
             params["Last Action"] = error.lastAction