More proper mouse grab killing in killfocus

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/EditablePanel.kt

@@ -1118,15 +1118,25 @@ open class EditablePanel<out S : Screen> @JvmOverloads constructor(
 		if (isFocused) {
 			isFocused = false
 		}
+
+		grabMouseInput = false
+	}
+
+	private fun killGrabMouseInput() {
+		for (child in childrenInternal) {
+			child.killGrabMouseInput()
+		}
+
+		grabMouseInput = false
 	}
 
 	fun killFocus() {
 		if (isEverFocused()) {
 			killFocusInternal()
 			findAbsoluteRoot().updateFocus()
+		} else if (isGrabbingMouseInput()) {
+			killGrabMouseInput()
 		}
-
-		grabMouseInput = false
 	}
 
 	fun findHierarchicalFocus(): EditablePanel<*>? {

src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/panels/input/TextInputPanel.kt

@@ -1156,7 +1156,7 @@ open class TextInputPanel<out S : Screen>(
 			cursorCharacter = pos.x
 
 			isSelecting = true
-			grabMouseInput = true
+			tryToGrabMouseInput()
 		}
 
 		return true