Fixed tab bar dragging issue

Atom seems to have changed the way the tab drag-drop placeholder works, and it was causing Nebula UI to “think” the placeholder was also a tab, causing tab widths to do funny things when dragging.

This update removes the nice transitions for tab width because there is literally no other viable CSS workaround that available at the moment, at least until CSS4 brings :nth-match functionality.

Added tab-bar preference

You can now disable auto-hiding of the tab bar if only a single, unmodified tab is open.

0.9.1

Made some minor tweaks & improvements primarily to the tree-view and scrollbars.

0.9.0

In the v0.8.0, Nebula UI introduced a new behavior where there was only one tab open, the tab bar would be hidden. This caused an issue where working in one tab wouldn’t show its modified state.

In this release, if a single tab is modified, it is animated back into view.

0.8.0

• Fixed: bug that featured text antialiasing flashing
• Tab bar hides when there's only one tab open (in line with Nebula's minimalism)
• Improved tree-view styling

0.6.0

• Perfected tab close animation (probably a better solution than any Atom theme out there)
• Housekeeping and minor tweaks/improvements
• Progress bars are now styled
• Toggles are now styled
• Fixed all open bugs

0.5.3

• Tab width now transitions smoothly to fill the entire tab bar after you close a tab (kind of like one-dark, but smoother).
• Tweaked some colors and cleaned up for preparation of 0.6.0.

0.5.2

• Improved font legibility across operating systems
  • macOS now has more aggressive SF font stack
  • Windows now has slightly thicker, easier-to-read font styles
  • Key binding tables now show the correct font
  • Input (atom-mini-editors) are slightly brighter now
• Horizontally-split panes now have equal tab bar height
• Improved Linter/invalid highlighting highlights
• Moved Linter support to UI theme
• Moved some Minimap styles to UI theme

0.5.1

• Added support for VCS Coloring in tabs (issue #7)
• Status bar is a tad lighter
• Cleaned up some styles

0.5.0

• Added initial support for the git-plus package
• Fixed a super annoying issue where the character-match highlight in select lists and autocomplete lists did not transition, while the rest of the text did
• The wrap-guide package should now work properly
• Improved some comments, made others a bit funnier
• Some performance improvements