Edit book: Fix trying to import an html file/css file via the add new file button always resulting in a blank file
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Edit book: When syncing the position of the preview panel to the cursor
in the editor and the cursor is at or before the <body> tag set the
position of the preview panel to the top of the file, so that the top
margin of the body tag is seen easily.
Make the capitalize function re-useable
Edit book: Allow customizing which dockable windows occupy the four dock corners via Edit->Preferences. You can now also choose to have more than one row of windows in a given dock area.
Add preferences action to help menu as well
Edit book: Add options to change the default font families/sizes for the preview panel
Edit book: Fix book not being marked as modified after editing the ToC
Remove the github issue tracker, as I am tired of closing bug reports from people that dont bother to read the section on how to report bugs in the README.
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Fix Spiegel Online, again
Get rid of the now unneccesary parse_feeds from spiegelde
Edit Book: Add buttons to the editor toolbar to make the selected text bold/italic/superscript/etc. when editing HTML files.
Edit book: Fix crash when editing books that have links to absolute
paths. Fixes #1261337 [Edit Book dies with "Value Error: path is on drive D: start on drive C:](https://bugs.launchpad.net/calibre/+bug/1261337)
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Edit book: Add buttons for quick color setting while editing HTML
Edit book: ToC view, allow single clicking on items to activate them
Update NZZ
Refactor file name checking to make it re-useable
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