Thanks for taking the time to compile this extensive list with suggestions. Please, find answers to your questions below:
On Fix browser editing before adding new features.
IE9 support is planned for 4.1 SP1 due in a month. We are aware of some issues with Chrome as well and will spend some time to fix them in the coming Service Pack.
Sitefinity project configuration data.
This a very interesting request which will add value to many users. That's why we added it our Issue Tracking System. To vote for it and follow its status, use this link.
Back-End template overview.
In stead of showing the whole path to the master file, we can show only the name of the file in this column. Will your customers find this convenient ?
Back-End page overview.
You are right, sorting by Date last modified will be much more convenient. We have logged an internal task to correct this. In the meanwhile, you can change this your self in section Settings . If you want to change the sorting of News to be my last date modified, go to Settings> Advanced> ContentView> ContentView> NewsBackend> Views> NewsBackendList and enter "LastModified DESC" in the field "SortExpression". You can change the values for the different sections in this way.
Some guidelines for organization of this folder are described in our Designer Manual here
We haven't yet decided on the exact integration with the marketplace and how it will be structured under the Themes folder. As to the example with Fonts - we would recommend storing them under folder Fonts but the other approach is also possible.
Your request was transferred to our internal web team. What our team will do is prepare a table where you can easily to what build each public release corresponds.
Thanks again for your time!
the Telerik team