ui: Revised project setup to customer feedback

* Support environment variables in compilation database path
* Moved advanced option (compiler flags & exclude paths) to separate dialog
* Allow environment variables that contain multiple paths
* Renamed 'Project Name' to 'Coati Project Name'
* Renamed 'Project File Location' to 'Coati Project Location'
* Renamed 'Project Paths' to 'Indexed Paths'
* Make all paths chosen by path picker relative to the project location
* Disabled name and location changing in project editing and removed project moving
* Added sub-titles to project setup dialogs
* Warn user when no Indexed Header Paths were set
* Deprecated lazy include search: It's only useable and visible to projects holding the key
* Split default file extensions for C++ and C

bug ids = 234 254 283 293 312 335

src/lib_gui/qt/element/QtDirectoryListBox.cpp

@@ -54,6 +54,17 @@ QString QtListItemWidget::getText()
 
 void QtListItemWidget::setText(QString text)
 {
+	FilePath relativeRoot = m_list->getRelativeRootDirectory();
+	if (!relativeRoot.empty())
+	{
+		FilePath path(text.toStdString());
+		FilePath relPath(path.relativeTo(relativeRoot));
+		if (relPath.str().size() < path.str().size())
+		{
+			text = QString::fromStdString(relPath.str());
+		}
+	}
+
 	m_data->setText(text);
 }
 
@@ -283,6 +294,16 @@ bool QtDirectoryListBox::isForStrings() const
 	return m_forStrings;
 }
 
+const FilePath& QtDirectoryListBox::getRelativeRootDirectory() const
+{
+	return m_relativeRootDirectory;
+}
+
+void QtDirectoryListBox::setRelativeRootDirectory(const FilePath& dir)
+{
+	m_relativeRootDirectory = dir;
+}
+
 void QtDirectoryListBox::resize()
 {
 	int height = m_list->height() - m_list->viewport()->height();