Restore original default for having condition format in filter line

Filter lines in Table Browser had lost conditional format entries in their
context menu. This restores the original behaviour.

And the name of the member boolean is changed to avoid double negations.

src/FilterLineEdit.cpp

@@ -10,7 +10,7 @@ FilterLineEdit::FilterLineEdit(QWidget* parent, std::vector<FilterLineEdit*>* fi
     QLineEdit(parent),
     filterList(filters),
     columnNumber(columnnum),
-    no_conditional_format(true)
+    conditional_format(true)
 {
     setPlaceholderText(tr("Filter"));
     setClearButtonEnabled(true);
@@ -179,7 +179,7 @@ void FilterLineEdit::showContextMenu(const QPoint &pos)
         });
 
 
-    if(!no_conditional_format)
+    if(conditional_format)
     {
         QAction* conditionalFormatAction;
         if (text().isEmpty()) {

src/FilterLineEdit.h

@@ -18,7 +18,7 @@ class FilterLineEdit : public QLineEdit
     void clear();
     void setText(const QString& text);
 
-    void setConditionFormatContextMenuEnabled(bool enable) { no_conditional_format = !enable; }
+    void setConditionFormatContextMenuEnabled(bool enable) { conditional_format = enable; }
 
 private slots:
     void delayedSignalTimerTriggered();
@@ -38,7 +38,7 @@ private slots:
     size_t columnNumber;
     QTimer* delaySignalTimer;
     QString lastValue;
-    bool no_conditional_format;
+    bool conditional_format;
 
 private slots:
     void showContextMenu(const QPoint &pos);