typo fix

show select file and diff file

change 'commit to branch' to 'switch branch'

change 'commit to new branch' to 'commit to branch'

add note for next n lines are not displayed in diff

V0.7.0 release

add stage and un-stage

add TGit style icon set

bug fix #15602

V 0.6.2, expand gitext, tgit commands