[root dialog] input style improvement

CHANGELOG.md

@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
     - Catalan contributions by [fitojb](https://github.com/fitojb)
     - German contributions by [JonasLoos](https://github.com/JonasLoos)
     - Italian contributions by [albanobattistella](https://github.com/albanobattistella)
+- minor UI improvements
     
 ### Features
 - New command line argument to clean the configuration and cache files: `--clean`   

bauh/view/qt/root.py

@@ -16,12 +16,13 @@ def is_root():
 
 def ask_root_password(i18n: I18n):
     diag = QInputDialog()
-    diag.setStyleSheet("""QLineEdit {  border-radius: 5px; font-size: 16px }""")
+    diag.setStyleSheet("""QLineEdit {  border-radius: 5px; font-size: 16px; border: 1px solid lightblue }""")
     diag.setInputMode(QInputDialog.TextInput)
     diag.setTextEchoMode(QLineEdit.Password)
     diag.setWindowIcon(QIcon(resource.get_path('img/lock.png')))
     diag.setWindowTitle(i18n['popup.root.title'])
     diag.setLabelText('')
+    diag.setOkButtonText(i18n['continue'].capitalize())
     diag.setCancelButtonText(i18n['popup.button.cancel'])
     diag.resize(400, 200)