improv: Hint about server pack contents generated from ZIP-archives

serverpackcreator-gui/src/main/i18n/Gui_en_GB.properties

@@ -162,6 +162,8 @@ createserverpack.gui.inclusions.editor.tip.default=Select an entry on the left t
 createserverpack.gui.inclusions.editor.tip.global.inclusions=Global inclusion filters do not have any effect on the server pack generation.
 createserverpack.gui.inclusions.editor.tip.global.exclusions=This global exclusion filter would exclude anything matching: {0}
 createserverpack.gui.inclusions.editor.tip.prefix=The following files would be included with this Inclusion-Specification:\n
+createserverpack.gui.config.zip.info.title=Generating from ZIP-archive
+createserverpack.gui.config.zip.info.message=Server packs from ZIP-archives always contain your specified files, plus automatically determined ones based on the ZIP-archive contents.
 migration.message.title=Things Have Been Migrated!
 menubar.gui.migration=Migration Info
 menubar.gui.filetoolarge=Size exceeds 10MB or 400.000 characters in length.\nMust be smaller than 10MB and 400.000 characters\nfor HasteBin upload.

serverpackcreator-gui/src/main/kotlin/de/griefed/serverpackcreator/gui/window/control/ControlPanel.kt

@@ -146,6 +146,14 @@ class ControlPanel(
         }
 
         if (!apiWrapper.configurationHandler!!.checkConfiguration(packConfig, encounteredErrors, true)) {
+            if (activeTab.getModpackDirectory().endsWith(".zip",ignoreCase = true)) {
+                JOptionPane.showMessageDialog(
+                    panel.parent,
+                    Gui.createserverpack_gui_config_zip_info_message.toString(),
+                    Gui.createserverpack_gui_config_zip_info_title.toString(),
+                    JOptionPane.INFORMATION_MESSAGE
+                )
+            }
             log.info("Config check passed.")
             statusPanel.updateStatus(Gui.createserverpack_log_info_buttoncreateserverpack_checked.toString())
             generateServerPack(packConfig)