* Code selection by column on DIFF screen
Fix of #3089
Two ways to select a text:
1. Position the mouse at the start of the text, press mouse left button, keep pressed, drag to the end of the text, release the button
2. Position the mouse at the start of the text, press mouse left button, release the button, position the mouse to the end of the text, press shift key + mouse left button.
Two ways to copy the selected text:
1. Press Ctrl + C or Ctrl + Ins
2. Mouse right button on the text to display the context menu and choose Copy
SPLIT VIEW (code at the left is the LOCAL code and code at the right is the REMOTE code):
- Text can be selected only at the left side, or only at the right side.
- The dummy empty lines which show the place of lines which exist only at the other side are not copied.
UNIFIED VIEW (LOCAL and REMOTE are mixed in the same column, "green plus" lines correspond to lines only in the LOCAL code, "red minus" lines correspond to lines only in the REMOTE code.
- Only the lines from the REMOTE code are copied
PATCH VIEW (split view + one extra column on the left)
- Same features as the SPLIT VIEW
* corrections lint javascript
* merge latest abapgit changes
* corrections lint javascript
* JS refactor functions to prototyped fns (classes)
* JS lint corrections + minor last minute changes
* conform current common.js standards
* LINT conform to common.js standards
* unused lines removed
* font
* css fix and icon rendering
* assets and font link in html head
* more icons
* more css fixes
* replace icon names
* dev docs
* Fonts update
* icons rename
* doc update
* linter fixes
* fix for abapmerge
